Steel V-Wheel, 60mm outer diameter (Size 4) and permanently sealed and lubricated. 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 4 = 60mm outer diameter
• Permanently sealed and lubricated
• Matches VR4, VRD4, VRS4 and VRSD4 V-Guide linear rails
• Precision dual row bearing construction
• 52100 bearing steel

Sealed V-Wheel Roller Bearing with 60mm diameter which is V-Guide Wheel Size 4 

• 52100 Bearing Steel
  
• V-Wheel Only
• Compatible with rail part number VR, VRD