Magnet button

When selecting magnet buttons, the most critical factor is the magnetic flux density (measured in Gauss) and the pull force. For heavy-duty bags, a pull force of 1.5kg to 3.0kg is standard, while lightweight garments require a lower force to prevent fabric tearing. You must also specify the magnet material, typically Neodymium (NdFeB) for high strength-to-size ratio or Ferrite for cost-sensitive projects. Additionally, ensure the electroplating thickness (e.g., hanging plating vs. rolling plating) is sufficient to pass a 24 to 48-hour salt spray test to prevent rust in humid environments.

B2B buyers must verify that the products are RoHS and REACH compliant, ensuring they are free from hazardous substances like lead, cadmium, and nickel. For children's wear, compliance with ASTM F963 or EN71-3 is mandatory to ensure the magnets are securely encased and do not pose a choking or ingestion hazard. Always request a Material Safety Data Sheet (MSDS) and third-party lab reports from the supplier before finalizing the contract.

Magnet buttons generally come in three types: Sew-on (PVC concealed), Prong-type (rivet), and Magnetic Snaps. PVC-encased magnets are ideal for waterproof garments and high-end coats where a hidden closure is desired. Prong-type buttons are the industry standard for leather handbags and wallets due to their structural stability. For technical gear, look for self-aligning magnetic buckles that facilitate one-handed operation.

Establish a strict AQL (Acceptable Quality Level) of 1.5 or 2.5. Key inspection points include magnetic polarity consistency (ensuring male and female parts attract correctly), rivet strength, and surface finish uniformity. For PVC-coated magnets, a leakage test is essential to ensure the plastic casing is airtight, preventing the magnet from oxidizing during laundry cycles.

Magnets are classified as 'Dangerous Goods' for air freight because they can interfere with aircraft navigation systems. You must ensure the supplier provides Magnetic Shielding Packaging (using iron sheets or specialized foam) and obtains a Non-Impediment Transport Certificate (DGM report). Failure to do so can lead to shipment rejection or heavy fines at customs.

To ensure transaction security, utilize Trade Terms like FOB or CIF and conduct payments through secure channels. We highly recommend sourcing through reputable platforms like Made-in-China.com, which offers Secured Trading services and Audited Supplier reports. This allows you to verify the factory's production capacity and legal status before transferring large deposits.

Magnet prices are highly sensitive to the market price of Rare Earth elements (like Neodymium). Negotiate a formula-based pricing model if you have long-term needs, or lock in prices during market lows. For bulk orders exceeding 50,000 units, aim for a 10-15% volume discount, and always clarify if the quoted price includes the cost of specialized magnetic-shielding packaging.

Verify the HS Code (typically 8505.11 for metal magnets or 9606.29 for buttons) to determine the exact tariff rate in your country. Be aware of Anti-Dumping Duties that some regions (like the EU or US) may impose on specific magnetic components from certain jurisdictions. Always consult with a licensed customs broker to ensure all documentation aligns with the latest international trade policies.