S6202 Open Ball Bearing Premium ABEC-5 Quality with Si3N4 Ceramic Balls (Silicon Nitride) 15mm x 35mm x 11mm S6202 open stainless steel ball bearing, radial and deep groove ball bearing,S6202 bearing is made of Stainless Steel with Ceramic Balls (Si3N4) and Nylon Cage,the quality is set to EMQ (Premium ABEC-5 quality) to ensure high speed,inner diameter is 15mm, outer diameter is 35mm and width is 11mm.