Ring Shape NdFeB Magnet Ring Outer Dia Inner Dia Thicness Max 170.00mm 120.00mm 50.00mm Min 3mm 1.50mm 0.50mm Tolerance ±0.05mm Plating Zn,Website:://.southmagnets.com,Ni,Ni-Cu-Ni,Black Epoxy,Gold,Blue White Cr3 Zn,Color Cr3 Zn Grade N33-N48,N33M-N48M,N33H-N45H,N35SH-N42SH, N28UH-N40UH,,N26EH-N35EH,N28AH-N33AH Specification 1,MOQ:10000pcs 2,Sample lead time:5-7days 3,Ports:Shanghai 4,Payment terms:L/C,T/T,Alipay 5,Certificate：ISO 2008, GSG Sintered Neodymium(NdFeB) magnets are the most advanced commercialized permanent magnet materials today.With far better permanent magnetic performance compared with traditional magnets,sintered neodymium magnets are the key functional materials for modern industry.