General description The Pack Office Chair Caster Wheels are designed for practicality and aesthetics, featuring a single-wheel mode that enhances the look of your office chair while providing stability and durability. Made from transparent polyurethane and solid steel fabric precision ball bearings, these heavy-duty casters ensure a firm and reliable performance. Technical specifications Wheel diameter: 3 inches Stem size: 7/16 x 7/8 inches Material: Transparent polyurethane with solid steel bearings Compatibility and accessories Fits 98% of office chairs Suitable for various floor types including wood, hardwood, laminate, vinyl, tile, and carpet Installation Easy installation with no tools required Usage Provides smooth and quiet gliding Prevents scratching, staining, or damaging floors Can be used effectively with chair cushions