Rollerblade Style Replacement Wheels for Office Chairs.  These Soft Wheel Casters were designed for use as replacement casters on office chairs. These casters are excellent for use for all types of hard floors including hardwood or laminate floors. They also work great on tile, linoleum, and other smooth hard surfaces. By incorporating a ball bearing axle and a double ball bearing raceway, this design insures the smoothest ride possible. The sealed Ball Bearing on the axle ensures that the wheels will turn regardless of the debris or hair on the axle.

Weight load capacity: 130 lb each.  
Wheel Diameter: 75mm (3" approx.)
Wheel Width: 7/8"
Stem Length: 7/8"
Stem Diameter: 7/16" Grip Ring Type
Color: Fork-Zinc plated.  Core-Red.  Wheel Tread-Clear