High-Strength Customizable Magnetic Zipper Closures for Bag & Sleeve | Custom Sizes Available

Magnetic Zipper Closure (Flexible Magnetic Closure Strip)

Magnetic Zipper Closure (Flexible Magnetic Closure Strip)

Material: NdFeB (Neodymium)
Size: 3mm Width x 6/10mm Thickness ，Customized length available
Grade: N35 / N45/ N52
Coating: Nickel-plated
Features: Waterproof, shock-resistant, bendable, and cuttable. The magnet’s heat-shrink tube coating offers protection while maintaining strong magnetic pull. Easy-to-use, click-close feature.

Applications: Ideal for bag closures, purse closures, sleeve closures, and more. This strong magnetic closure creates a crisp, satisfying “click” sound, ensuring secure, seamless fastening for pouches, bags, and sleeves.

How does it work, see our youtube video here!

• One-hand close
• No snagging
• Cleaner look
• Custom length

Why Choose This  Magnetic Zipper Closure?

• Superior Magnetic Strength: Crafted from high-quality NdFeB material, this magnet offers exceptional magnetic strength, ensuring a secure closure for various applications.
• Versatile Design: This magnet closure is encased in a heat-shrink tube, offering durability, waterproofing, and shock-resistance. It can be bent and cut to fit specific needs.
• Simple Use: Unlike traditional magnetic snaps, this magnetic closure allows the two sides to snap together effortlessly, providing a solution similar to a zipper but with a quicker, more efficient closing mechanism.
• Customizable Options: Richarms provides customizable sizes, grades, and tube lengths for the magnetic closures to meet your unique product specifications.

Packaging:
Magnet in heat-shrink tube coating

Small unit magnets available in round (radial magnetization) and square (thickness magnetization) shapes, offering customizable magnetic properties.

Magnetic Zipper Closure: NdFeB magnets encased in heat-shrink tubing for enhanced protection and easy handling, offering flexibility for customized closures.

Magnetic Zipper Closure encased in heat-shrink tubing, offering durability, waterproofing, and flexibility for a variety of applications.

Richarms supplies high strength hidden magnet for bag and purse pouches closures. These hidden magnet packed in long tube can be used as pocket closures. Our hidden magnet come in different strength and range in many sizes in both round and rectangular shapes.

Compared with a set of traditional magnetic snap, this magnetic closure packed in tube design offer a full seal solution as zipper does. It’s better than a zipper for it’s smart to close by attracted to the other side when the user just easy make the pouches both side closer, and the customer can be free from getting stuck.

In the above picture, magnet material is N45, size is 3mm diameter and  10mm length, diameter magnetized. Magnet size, grade and the tube length can be made as per your order.

The heat-shrink tube can be transparent, natural color, black, or even customized to match your specific design needs. This added customization provides enhanced aesthetic options and allows for tailored branding and functional protection.

Various heat-shrink tube options for Bar NdFeB magnets, including transparent, natural, black, and customizable colors for tailored design.

Structure Options: 3 Magnetic Zipper Closure Layouts (Choose by “Strength vs. Flexibility”)

Our magnetic zipper closure strip can be built with three internal layouts. All options use a protective outer tube (EVA/TPU/Plastic tube), while the inside core determines closing strength, flex feel, and how “forgiving” it is on curved openings.

Option A — Alternating (1 Magnet + 1 Silicone Spacer)

Magnetic zipper closure cross-section with two magnets then silicone spacer (MM–S repeat) inside a flexible tube.

Best for: softer feel, smoother bending, curved openings
Layout: M | S | M | S | M | S ...
Why buyers choose it:

• More flexible, easier to follow curves
• Softer hand-feel due to silicone spacing
• Great balance for pockets / apparel openings / sleeve edges

Typical core examples:

• Magnet: 3×6mm N35 or 3×10mm N52
• Spacer: 3×10mm silicone
• Standard OD: ~3.5mm; length 100mm / 160mm / custom

Option B — Full-Magnet (Continuous Magnets)

Magnetic Zipper Closure Structure B (Full-Magnet Core)

Best for: maximum holding force, straight openings, premium “snap-close”
Layout: M | M | M | M | M ...
Why buyers choose it:

• Strongest attraction along the entire length
• Feels most like a “magnetic zipper” when closing
• Ideal for bag openings, structured cases, and clean-edge closures

Typical core examples:

• Magnet: 3×6mm N35 or 3×10mm N52
• Standard OD: ~3.5mm; length 100mm / 160mm / custom

Option C — Grouped (2 Magnets + 1 Silicone Spacer)

Magnetic Zipper Closure Structure C (M–S Alternating Core)

Best for: strong closing + extra flexibility (balanced “power & comfort”)
Layout: M | M | S | M | M | S ...
Why buyers choose it:

• Strong “closing points” from paired magnets
• Silicone gaps give better flexibility than full-magnet design
• Great for fashion goods where both hold + comfort matter

Typical core examples:

• Magnet: 3×6mm N35
• Spacer: 3×20mm silicone
• Standard OD: ~3.5mm; length 100mm / 160mm / custom

Quick Selection Guide

• Need maximum strength? → Option B (Full-Magnet)
• Need best flexibility/soft feel? → Option A (Alternating)
• Need a balanced “strong + flexible”? → Option C (Grouped)

How to Specify for a Quote (Copy & Send)

Please send us:

1. Application (bag opening / laptop sleeve / pocket / apparel)
2. Length (e.g., 160mm or custom)
3. Core option (A/B/C)
4. Magnet size & grade (e.g., 3×10mm N52)
5. Outer tube (TPU/EVA/Plastic tube) + color
6. Bonding method (heat press / heat weld / heat lamination)

Magnetic Zipper Closure FAQ:

• Can it be cut? Yes, anywhere.
• Washable? Yes, with tube, waterproof.
• Minimum order? No
• Sample lead time? 7-10 days

Material: NdFeB (Neodymium)
Shape Options: Disc, Cylinder, Block, Ring, Countersunk, Segment, Trapezoid, and more custom shapes
Magnetization Direction: Thickness Magnetized or Radially Magnetized (customizable)
Coating Options: Nickel (Ni), Zinc (Zn), Gold, Silver, Copper, Epoxy and more
Size and Tolerance: Custom sizes with tolerances ranging from +/-0.03mm to +/-0.15mm
Working Temperature: Maximum operating temperature up to 230°C based on grade
Delivery: Small order available, Available by sea, air, or express delivery

NdFeB magnets securely packaged in small white boxes, ensuring safe transport and easy handling.

Packaging:

NdFeB magnets undergo a careful de-magnetization packaging process, involving layers of iron boxes, foam, and paper boxes to ensure secure transport.

Understanding the two magnetization directions for NdFeB magnets: Thickness Magnetized and Radially Magnetized.

Magnetization Direction:
Thickness Magnetized
Radially Magnetized

Key Features of Segment NdFeB Magnets:

• Customizable for Industrial Applications: Our Segment NdFeB magnets are highly versatile and can be customized in terms of size, shape, magnetization direction, and coating. They are designed to meet your specific application needs in industrial settings.
• High-Performance and Temperature Resistance: These magnets offer exceptional magnetic strength and can withstand a wide range of temperatures, with certain grades reaching up to 230°C in high-temperature environments. Perfect for applications in motors, sensors, and electronic devices.
• Available in Various Shapes: Choose from a wide range of shapes such as discs, cylinders, blocks, and segments, with custom designs available for more specialized requirements. Whether you need a trapezoid, ring, or countersunk magnet, we’ve got you covered.
• Efficient Delivery: With flexible delivery options, we ensure timely shipping via sea, air, or express services to meet your project timelines.

Why Choose Our Segment NdFeB Magnets?

• Custom Magnetization: Our Segment NdFeB magnets can be magnetized in different directions, including thickness or radial magnetization, to suit your specific application.
• Durable and Reliable: With a variety of coatings such as nickel, zinc, gold, and epoxy, these magnets are protected against corrosion, ensuring long-term durability.
• Superior Strength and Efficiency: Known for their strong magnetic properties, NdFeB magnets provide excellent performance across a wide range of industries, including electronics, automotive, manufacturing, and energy.

Bar NdFeB magnets can be encased in heat-shrink tubing, providing extra protection. This heat-shrink wrap makes the magnets waterproof, shock-resistant, and oxidation-proof, ensuring they remain in optimal condition even in harsh environments. This added layer of protection increases their durability and reliability for long-term use in a wide range of applications.

NdFeB magnets securely packaged in small white boxes, ensuring safe transport and easy handling.

Packaging:

NdFeB magnets undergo a careful de-magnetization packaging process, involving layers of iron boxes, foam, and paper boxes to ensure secure transport.

Understanding the two magnetization directions for NdFeB magnets: Thickness Magnetized and Radially Magnetized.

Key Features of Bar NdFeB Magnets:

• Customizable for Various Applications: Our Bar NdFeB magnets are highly customizable in size, shape, magnetization direction, and coating. Whether you need smaller sizes for RFID blocking, larger sizes for industrial machinery, or specific magnetization patterns, we can meet your needs.
• High-Strength Performance: These NdFeB bar magnets are known for their high magnetic strength, making them ideal for applications like bag closures, purse clips, journal covers, and IC parts.
• Durable and Reliable: With a variety of protective coatings like nickel or epoxy, these magnets are designed to last, offering long-term durability and resistance to corrosion.
• Efficient Delivery: We offer flexible delivery options, ensuring you receive your Bar NdFeB magnets quickly and securely. Choose from sea, air, or express shipping to meet your project deadlines.

Applications of Bar NdFeB Magnets:

• Bag Closures: Perfect for use in magnetic closures for bags, purses, and backpacks, ensuring easy-to-use, secure fastening.
• Purse Clips & Journal Covers: These magnets are ideal for securing purse clips and journal covers, offering a sleek, reliable solution.
• IC Parts: With customizable sizes and strength, Bar NdFeB magnets are great for use in IC parts, ensuring precision and high performance in sensitive equipment.

Why Choose Our Bar NdFeB Magnets?

• Versatile Customization: Choose the perfect size, shape, and magnetization direction for your specific application needs.
• Superior Strength: Known for their exceptional magnetic power, Bar NdFeB magnets offer high holding force in various industrial applications.
• Cost-Effective Solutions: Get high-performance magnets at competitive prices, ideal for wholesale orders and bulk production.

Packaging:

Magnetization Direction:
Thickness Magnetized
Radially Magnetized

How to make stronger power button?
– Magnets in same size, material better, power stronger
– Magnet in same material, size bigger, power stronger

Which silver color is better? Zinc or Nickel Plating?
– Zinc will be at lower cost
– Nickel will be shiny, and easy to pull out

What’t packaging will Richarms offer?
– for big size magnet, we might suggest to add divider so that customer will easy to pull out each one
– Standard Packaging is plastic bag + box + carton
– Degaussing Packaging is plastic bag+box+form box+carton, for some voyage ask no magnetic power tested on the outer box

Want quick quote or free sample, pls consult our sales teams 

Cylinder magnet can be encased in heat-shrink tubing, providing extra protection. This heat-shrink wrap makes the magnets waterproof, shock-resistant, and oxidation-proof, ensuring they remain in optimal condition even in harsh environments. This added layer of protection increases their durability and reliability for long-term use in a wide range of applications.

Uncoated raw strong cylinder magnet showcasing its robust NdFeB core for custom applications.

Packaging:

NdFeB magnets securely packaged in small white boxes, ensuring safe transport and easy handling.

NdFeB magnets undergo a careful de-magnetization packaging process, involving layers of iron boxes, foam, and paper boxes to ensure secure transport.

Understanding the two magnetization directions for NdFeB magnets: Thickness Magnetized and Radially Magnetized.

Key Features:

• Waterproof: The ABS coating provides reliable water resistance for outdoor and harsh environments.
• Shatter-Proof & Rust-Proof: Durable encapsulation protects the magnet against impact and corrosion.
• Versatile Use: Suitable as a raw magnet or as an encapsulated solution for hidden magnet applications in bag hardware and other custom products.
• Eco-Friendly: Made with environmentally conscious ABS material, ensuring a sustainable and robust product.

Overview:
Our Encapsulated Strong Magnet Cylinder offers exceptional magnetic strength in a compact design. Engineered from premium NdFeB and encapsulated in eco-friendly ABS, this magnet is designed to withstand water, impacts, and corrosion. Its sleek finish—available in standard black or white, with custom color options—makes it perfect for a wide range of applications including hidden magnet systems, bag hardware, and various industrial uses.

Ideal Applications:

• Hidden magnet applications in custom bag hardware
• Industrial and consumer products requiring robust magnetic solutions
• Accessories and components where a sleek, durable magnet is essential

Ready to integrate this high-performance magnet into your product designs? Contact us at info@richarms.com or visit Richarms Online Shop to place your order or request a sample.

Packaging:

Magnetization Direction

Richarms offers innovative Sew In Hidden Magnets, expertly designed with a high-performance single-pole magnet sealed securely within waterproof plastic casings, including durable PVC and flexible, soft-touch TPR. These versatile hidden magnets seamlessly integrate into fabrics, ensuring a discreet yet robust magnetic closure solution.

Our sewable hidden magnets combine convenience, elegance, and reliability. Encasing the powerful neodymium magnets in a waterproof, oxidation-resistant PVC or TPR film ensures prolonged magnet lifespan and enhanced safety—even if a magnet fractures, it remains intact and retains functionality. The magnet fragments won’t scatter, preserving magnetic power and product integrity.

Common Applications Include:

• Handbags & Wallets: Seamlessly hidden magnetic closures that maintain sophisticated aesthetics.
• Leather Journal Covers: Premium feel and easy closure without visible hardware.
• Apparel & Outerwear: Discreet closures perfect for jackets, coats, and pockets.
• Gift & Packaging: Refined, secure closures for premium gift boxes and packaging designs.

Customizing your sew-in hidden magnet is straightforward. Richarms provides extensive flexibility, allowing you to select magnetic strength, precise dimensions, and shape to meet your exact requirements.

Whether you’re a DIY enthusiast working on custom projects or a manufacturer seeking high-volume solutions, we have you covered. DIY users can easily sew in magnets directly, while professional manufacturers may prefer specialized equipment for seamless, efficient mass production.

For a tailored solution, reach out to our experts today for a personalized quote, or conveniently order directly through our Shopify Store.

Explore related products like our standard single pole magnet for additional versatility.

Our stock size will be delivered within 3 days
Disc Shape (mm): 8×2, 10×2, 12×2, 15×2, 15×3, 17×2, 17×3, 18×2, 18×3, 20×2, 20×3, 22×3, 25×3
Rectangular Shape (mm): 20x10x2,27x8x3

Other customized dimension lead time is 15-20 days

Pack：

1 set = 1 “+”, 1 “-“, or customer can only order 1 pole

Grade:
N30 N35M-N52M, N35H-N50H, N33SH-N45SH

Finishes：
Standard finish is PLAIN metal cap, PLAIN or PATTERN plastic cover, logo customized available
Regular color is Zn. Custom finishes are also available to meet your requirements.

Application：