Universal ball bearing rolling flexible. 1) materials: Carbon steel, galvanization Stainless steel 2) precision: p0/p2/p4/p5/p6 3) vibration: v1/v2/v3/v4 4) clearance: c0/c2/c3/c4/c5 5) noise levels: z1/z2/z3/z4 6) applications: transmission system, feeding system, processing system, processing machinery and packing machinery