[Always Protected] Newly styled upgraded office chair wheels are made with heavy-duty powder-coated carbon steel brackets, precision ball bearings and an extra-thick polyurethane layer. Say goodbye to your old low-quality plastic wheels.Chair roller wheels guaranteed to protect wood, hardwood, laminate, vinyl, tile, carpet all day long, provide scratch-free protection and save money on chair cushions. [Smoother Ball Shape] Casters' ball-shaped casters enhance maneuverability with a resilient polyurethane rubber feel and precision ball bearings in the shaft. Giving the chair the flexibility to turn 360° on any . Casters for office chair rolls silky smooth and silently, making it perfect for the joy of freely around shared office spaces, professional gaming environments. [Effective Investment] Our roller chair wheels feature universal compatibility grip loop bars of industrial grade steel (0.9x0.4in) that fit 99% of other office chair . The office chair replacement wheel best alternative to transform that squeaky, noisy chair. IMPORTANT NOTE: It does not fit for chairs. [Supports 2000 LBS] Our heavy duty office chair wheels feature single wheels that are 2 inches wide to provide a larger landing area. Provides smarter and balanced weight distribution. Each caster can hold up to 440 pounds. A set of 5 office chair wheels can hold up to 2200 lbs. Colour:Black Material:Plastic Package Contents: 4 * Wheel Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.