Permanent magnet Product feature< necessary :information for exact quotation> 1)material: ndfeb 2)shape: disc, round, block, ring, block with hole, cylinder, rectangle, cube, circular, etc. 3)grade: n30, n33, n35, n38, n40, n42, 35m 4)size can be customsed with tolerance 0.05-0.1mm 5)coating: zinc/nickel/gold/epoxy, ni+cu+ni coating , etc. 6)sample : we can offer samples for your testing and you have to pay for the express fee. 7)sample leadtime: 3-5 days . 8) mainly used for industrial application like wind generator , wind turbines, motor, car accesorries, etc..