... .fast delivery. 3.quality according to ISO9001:2000,TS16949,RoHS. Arc ferrite magnet1.great for DC motor,auto application such as ... .addition:Ca,Sr,Si.Al,rare-earth metal.4.Shape:arc,block5.custom design is acceptable.6.high resistance to demagnetization ... packages.c.Any questions pls feel free to contact us. Arc ferrite magnet