Relatively low cost; Poor resistance to corrosion and should have a coating; Very high strength; Can replace SmCo magnets. Product briefs:Grade available:all grades from N30 to 30EH,specialized in high gradeSize:Shapes as customers requestedCoating:Ni ,Zn,Epoxy,Cr,Gold,black Ni,etcCertificate:IS09001:2000,TS16949 We sincerely appreciate your recognition and welcome you enquiry!