6308DDU Ball Bearing Double Sealed ID 40mm OD 90mm Width 23mm Inner Diameter - 3 7/16 inch (3.4375") Bearing outer diameter is 12mm

Bearing outer diameter is 12mm and Bearing width is 10mm

6317ZC3BNLS Nachi Bearing

and 8mm width

This compact

6308DDU Ball Bearing Double Sealed ID 40mm OD 90mm Width 23mm Inner Diameter - 3 7/16 inch (3.4375") Bearing outer diameter is 12mm6308DDU Deep groove ball bearing single row Radial Bearing 40x90x23 6308DDU Deep groove ball bearing single row Radial Bearing 40 mm ID x 90 mm OD x 23 mm Wide. Item Sku : 6308DDU Brand : VXB Type : Deep groove ball bearings Inner (ID) : 40mm Outer (OD) : 90mm Width : 23mm Inner Inch : 1. 575 Inch Outer Inch : 3. 543 Inch Width Inch : . 906 Inch Size : 40mm x 90mm x 23mm Size Inch : 1. 575" x 3. 543" x . 906" Dynamic load : 42. 3 kN Static load : 24