With Holes : NoApplication : Industrial MagnetComposite : Rare Earth MagnetModel Number : imanesShape : BallType : PermanentOrigin : Mainland ChinaCertification : NONENeodymium magnet 50x30mm /40x20mm/40x10mm1. N35 Tolerance: 1-3mmThe cheapest & strongOur N35 magnet stronger than any other cheap store2. N52 Tolerace:0-3mmThe Best & strongest3.GoodqualityGoodpackageGoodproductionlineGoodsourceofmaterialsGoodsupervisionofproductionPayattentiontodetailsZerodefectHigh-endproductNotice:It is not recommended to stopwater meters or electricity meters, which will cause damage to your country or violate regulations.The magnet is fragile and this product combination protects the magnet from damage andrust.Ordinary neodymium magnets only use one side of their magnetic field to stick to metal which means theyre only using half of their available strength. However,if add a steel cup, the other pole of the magnet to be used which increases the strength of the magnet to much higher than that of a normal neodymium magnet but also makes the other side magnetically weak.If the highest possible pull force is required, then neodymium cup magnets are the answer to your magnet needsThis is our real magnet When shopping, please pay attention to the size and dimensions of the product to ensure that it meets your needs. In the title and , we have provided detailed information about the product, including its features and specifications We want you to be completely satisfied with your purchase, so if you have any questions or concerns, please don't hesitate to contact us. We are here to help and will do our best to assist you. Thank you for choosing our product. We hope you enjoy it!Products from jinyu's store