... bearing 4.steel material Original NSK Deep Groove Ball Bearing Our main products include deep groove ball bearings,miniature thin-wall bearings ... ,16002,16003,16005,16007(3)Sealing form:OPEN,Z,ZZ,V,VV,DU,DDU,N(4)Material:Gcr15(5)Quality standard ... tools,sports goods,office appliance Our products: Ball bearing: Deep groove ball bearing, Trust ball bearing, Self-aligning ball bearing, ceramic ...