Product Parameters | Negative Tolerance Instructions and Instructions for Use Material: Tiefa boron strong magnetic Specifications: round, multiple specifications, Negative tolerance 0.4mm, tolerances vary with different specifications Magnetization direction: thickness magnetization (N/S poles are located on the upper and lower planes) Operating temperature:≤80 ℃ Supports customization, please contact customer service if you have any needs 📌The weight of a single piece is displayed in the SKU option. The value is for reference only and may fluctuate slightly due to tolerances. This link is for negative tolerance products. If you need standard sizes, please choose the corresponding standard size link. For standard size, take this link below https://detail.1688.com/offer/1075770168927.html?spm=a28888.manage-offer.0.0.262271976U28Wo Terms and Conditions ⚠️The texture of NdFeB is brittle and hard. It is strictly forbidden to hit or attract the magnets directly to each other. To separate the magnets, please push them horizontally and stagger them to avoid pinching your fingers or chipping and damage of the magnets. ⚠️Please stay away from mobile phones, bank cards, electronic displays …