Will the magnetism be weaker after use years?

Yes, magnets do weaken over time.If you store permanent magnets correct, neodymium magnets will likely lose less than 1% of their flux density over 100 years.The magnetism decline is neglect, that's why we call it Permanent Magnet.

Neodymium Magnet D4mm X 10mm N42 Magnetic Therapy Magnet

Name: Neodymium Magnet D4mm X 10mm N42 Magnetic Therapy Magnet
Brand: Ningbo Bestway Magnet Co., Ltd.
SKU: 881926675

Zhejiang, ChinaNingbo Bestway Magnet Co., Ltd.

US$0.15

1,000-9,999 Pieces

US$0.12

10,000-99,999 Pieces

US$0.10

100,000+ Pieces

Sample price:US$1.00/piece.Request sample

Product profile

Customization

Available

Application

Speaker Magnet, Industrial Magnet, Motor Magnet

Shape

Cylinder

Model NO.

BWND

Coating

Nickel

Grade

N42

Product Name

D4mm X 10mm N42 Magnetic Therapy Magnet

Composite

Neodymium Magnet

Certificate

CE/SGS/ISO

Tolerance

+/-0.1mm

Size

According to Customers' Request

Transport Package

Carton

Specification

CE, RoHS

Trademark

Bestway

Origin

Ningbo, China

HS Code

85051110

Production Capacity

1000000PCS/Month

Key features

Customized Size and Shape: We produce customized size and shape magnets according to customers' requirements.

Wide Application Range: Used in motors, sensors, microphones, wind turbines, speakers, and magnetic separation.

Multiple Coating Options: Available coatings include Nickel, Zinc, Epoxy, Gold, and others for protection.

Fast Reply Time: Customers receive replies within 15 minutes during working hours (08:00-18:00 UTC-8).

Free Sample Availability: Free samples provided for in-stock items; customers only pay for delivery costs.

High Stability Magnetism: Neodymium magnets lose less than 1% flux density over 100 years if stored correctly.

Flexible Shipping Methods: Magnets can be shipped by air or express with specialized magnetic shield packaging.

Professional Technical Support: Technicians provide professional advice on magnet application if specific details are missing.

Company profile

Importers and ExportersHigh Repeat Buyers ChoiceExperienced Team100% Finished Products Inspection

Ningbo Bestway Magnet Co., Ltd.

Zhejiang, China

Business Type: Manufacturer/FactoryExport Year: 2011-03-02Nearest Port: NINGBO, ShanghaiAverage Response Time: ≤3.24hTerms of Payment: LC, T/T, D/P, etc.International Commercial Terms(Incoterms): FOB, EXW, CFR, CIF, DDP, CIP, CPT, Others, FCA

AI-Powered supplier vetting

SummaryThe supplier is identified as a combined company and professional technical supplier with 3D design, ODM, OEM, and broad customization capabilities. It has manufacturing contracts with associated subcontractors, in-stock capacity, stated annual magnet productivity of 800 tons, export capability, and 71%–90% export sales. Quality assurance and raw-material traceability are reported. However, no SDK, overseas warehouse, overseas agents or branches, overseas showroom, or offline trade-show participation are reported. The supplier had no new products in the past year. Corrective-action and complaint-handling procedures exist but lack written records, while environmental and fire-drill statuses are unknown. No explicit certification information or named customer cases is provided.

Supplier typeThe supplier is explicitly described as a professional technical supplier and a combined company. It has self-operated import/export rights and has exported since 2011, indicating an established manufacturing and export-oriented supplier profile.

R&D capabilityThe supplier has R&D capability, provides 3D software design, and offers ODM services and several customization modes. Countervailing evidence includes no available SDK and no new products during the past year, so innovation is demonstrated mainly through design and customization rather than recent product development.

Production capacityThe supplier has valid manufacturing-capacity contracts with each associated subcontractor, in-stock capacity, 12 qualified service-capability suppliers, and reported annual magnet productivity of 800 tons. Export capacity and self-operated import/export rights further support operational capability.

Customization capabilityThe supplier explicitly provides customization from samples, designs, full customization, minor customization, and flexible customization, alongside 3D design, ODM, and OEM services. These are direct indicators of broad customization capability.

Product Q&A

Q:How fast can I get a reply?

You will receive our reply within 15 minutes during our work time 08:00-18:00(UTC-8).

Q:What information do I need to supply when I have a inquiry?

In order to get precise quotation on time,pls inform us following details when you send inquiry to us: Dimensions or drawing;Grade of Material;Magnetized direction; Surface coating(if necessary) ;Quantity and delivery terms. If you have don't have above information, you can inform us the application of the magnets, our technician will provide professional advice for you.

Q:Can you offer customized size and shape?

Yes, we could produce customized size,shape magnets according to customers' requirements.

Q:Can I have a free sample before mass production?

Yes. We could offer free samples if the magnets are in stock but you need to pay the delivery cost. It may take minimum 7 days for production if your size is out of stock.For neodymium magnets, we have many different size samples in stock.

Q:Can magnets could be shipped by air or by express ?

We could ship the magnets by air or by express with our magnetic shield package.