Features: 
-Features a 360 degree swivel mounting plate attached to a double wheel roller system.
-Two-Hole, metal and Flange-mounted 16mm ball bearing resting on individual support bearings and is ideal for most industrial transfer applications.
-Ball transfer unit can also be used in a variety of non-industrial applications, including retail store displays and airport luggage transfers.
-Ball support cup is hardened and plated, protective cover assures low torque and longevity.
-Ball Transfer Unit is perfect replacement for your broken one on your office chair.

Specifications: 
-Material: Stainless Steel
-Surface treatment : Zinc Plating
-Model : CY-15A ,5/8-A
-Length : 50mm
-Width : 32mm
-Height : 21mm
-Mounting Hole Pitch : 40mm
-Fixing Hole Distance : 4mm
-Ball Diameter : 15.875mm (5/8 inch)
-Single Load : 10kg (Max. 20kg)
-Single Weight : 43g

Package Included: 
2 x Ball Transfer Unit