[Always Protected] Newly styled upgraded office chair wheels are made with heavy-duty powder-coated carbon steel brackets, precision 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 in the shaft. Giving the chair the flexibility to turn 360 on any surface. 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 to 440 pounds. A set of 5 office chair wheels can 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.