The magnets are small and packaged in foam, you can only find it by tearing the tape on the foam When connecting two magnets, draw them close to each other slowly and gently. Hard crushing would cause damage and cracks in the magnetic material。 Please keep away the magnet from high temperature and corrosive environment，although there is a coating on the surface of the magnet. Each loose or separable magnet in a subject magnet product that fits entirely withinthe cylinder described in 16 CFR 1501.4 have a flux index of less than 50kG2 mm2 when tested in accordance with the method described in § 1262.4.