V-Wheel Steel Roller Bearing VW3 V-Guide Size 3 - Outer Diameter 45mmSteel V Wheel, 45mm outer diameter (Size 3). V Guide wheels are precision ground, dual row angular contact roller bearings with hardened outer surfaces, offering low friction guidance for linear motion applications. They can be used with internal or external 90 degree rails, as well as round shafts. Size 3 = 45mm outer diameter Matches VR3, VRD3, VRS3 and VRSD3 V Guide linear rails Precision dual row bearing construction 52100 bearing steel