2 inch swivel chair wheels 5 office chair glides, rod diameter 11 mm, base diameter 50 mm, installation height 60 mm. Chairs that cannot be used with 10 mm wheels are fixed wheels for 2 swivel chairs. Better floor protection: The package contains 5 pieces of felt pads. The bell glide set has a soft felt bottom that can better protect your soft bottom. The felt mat can reduce the effect of weight and ensure that it remains quiet during use. Black nylon material: Nylon material protects the floor better. The office chair wheel is made of high-quality solid black nylon material, thicker and durable, the bearing is strong, can be a cost-effective replacement for chair wheels. Easy replacement: Replace old and worn rollers, easy replacement, remove old rollers/slides and insert new glides. With these bell glides for office chairs, rolling office chairs can be transformed into a stationary chair without losing the chair's height. Floor glides for chairs These office chair glides fit most commercially available chair wheels and are suitable for most swivel or office chairs because they are fixed, save space and protect the floor.