V-Wheel - Sealed Stainless Steel VWSS4 V-Guide Size 4 - Outer Diameter: 60mmStainless Steel V Wheel, 60mm outer diameter (Size 4) and permanently sealed and lubricated. V Guide wheels are dual row angular contact roller bearings 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 4 = 60mm outer diameter 440 stainless steel construction Permanently sealed and lubricated Matches VRS4 and VRSD4 V Guide linear rails Precision dual