stainless steel slim bearings-Augular contact ball bearings SB Series(5/16'') A-TYPE-Slim bearings Whether the seales: NO | YES Series:SAA,SA,SB inner: 1.000inch(25.4mm)-20inch(508mm) outer: 1.375inch(34.925mm)- 22inch(558.8mm) Weight:0.016kg-7.167kg Slim Bearings was used widely in Textile printer, Medical device, Rotary tables, Radar, Communication, Aircraft, Aerospace, Astronomy instrumentation and Industrial robotics etc. because of its characteristic such as small space, light weight and low friction. Please kindly check the detailed model for your choice: SB020AR0 SB025AR0 SB030AR0 SB035AR0 SB040AR0