... 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. ... High anti-corrosion and stable performance. Can be magnetized through thickness;length,width. Environment and recycle friendly Meet the environment ...