BB20-2K-K One way Bearing Shield Sprag Freewheel Clutch With One Key-way on the inner RingBB20 2K K One way clutch Shield Sprag Freewheel Bearing With One Key way on the inner Ring BB20 2K K One way clutch Shield Bearing, Bearing inner diameter is 20mm, outer diameter is 47mm and width is 19mm. Item: BB20 2K K Bearing Type: One Way Clutch Bearing Inner Diameter: 20mm Outer Diameter: 47mm Width: 19mm Torque: 1. 3 Ncm One Key way on the inner Ring Quantity: One Bearing Dimension Torque Ncm d D W 20mm 47mm 19mm 1. 3