Detailed Product Description 1) High quality and low noise 2) Quality standard: P0 in chrome steel, stainless steel, carbon steel for insert bearings, steel, plastic, aluminum housing units 3) Bearing series: UC, RB, SB, SA, UE, HC, UK, UCP, UCF, UCFL, UCPA, CFC, SBPP, SBPF, SAPF, SBPFL, SAPFL, SBPFT, SAPFT, SER, AEL, CSA, other series 4) Automatic aligning, repeated lubrication, dustproof, ...