Material of deep groove ball bearing : Chrome steel ,stainless steel Delivery Detail: 7-30 days for deep groove ball bearing Supply Ability of deep groove ball bearing : 300000pcs per Month. series production range structure 6000 80-1200 Z,2Z,RZ,2RZ,N,RN 6200 80-800 Z,2Z,RZ,2RZ,N,RN 6300 80-1000 Z,2Z,RZ,2RZ,N,RN 6400 80-1700 Z,2Z,RZ,2RZ,N,RN 61800 80-2000 Z,2Z,RZ,2RZ, 61900 80-2000 Z,2Z,RZ,2RZ, Packaging Detail for deep groove ball bearing : Standard industrial packing/Single box packing and cartons and pallets. we also can pack according to your requests.