UC203 17mm Axle Bearing Insert Mounted BearingUC203 Mounted Bearings 17mm x 47mm x 31mm 17mm mounted Bearing UC203, measures an inner diameter of 17mm, the outer diameter is 47mm, the inner ring width is 31mm and the outer ring width is 16mm, a standard bearing size commonly used in a variety of industrial and commercial applications. UC203 Bearing Mounted Bearing Bearing Size: 17mm x 47mm x 16mm 31mm Inner Diameter: 17mm Outer Diameter: 47mm Inner Ring Width: 31mm Outer Ring Width: 16mm Dynamic