100pcs 4x2 neodymium magnet permanent n35 ndfeb super strong powerful small round magnetic magnets disc 4mm x 2mm

description: shape: round tolerance:±0.3mm size: 4 x 2mm certification:rohs passed grade:n35 plating: nickel + copper + nickel triple layer plated max operating temperature: 80c/176f notice: 1. the large neodymium magnets are extremely strong, and must be handled with care to avoid personal injury and damage to the magnets. fingers and other body parts can get severely pinched between two attracting magnets. it is easy broken,please be careful. 2. never place neodymium magnets near electronics 3. neodymium magnets are brittle, and can peel, crack or shatter if allowed to slam together.