... coating 4.best price 5.timelu delivery counterbored/countersunk ring NdFeB magnet Ring NdFeB magnet1.Material of NdFeB magnet:Magnet N-( ... Passivation, any coating as you like.3.Magnet shape: Block,Ring, Arc,Disc, Cylinder, Rod,Bar, Cube,Sphere,Strip etc ... size; large size is available too. shape square magnets;neo cube magnets;block magnets; rectangle material sintered NdFeB magnet;rare earth permanent ...