Quick Details Place of Origin: Guangdong, China Brand Name: Topmag Model Number: N35 N40 N42 N48 N52 Type: Permanent Composite: NdFeB Magnet Shape: Customized Application: Industrial Magnet Coating: Customised (Zn, Ni-Cu-Ni, Ni, Gold, Silver, Copper, Epoxy, etc) Magnet Tolerance: +/-0.05 to +/-0.01mm Certification: ISO9001 : 2008, SGS