ATOMDOC Office Chair Caster Wheels, 3" Newly Lightweight Caster WheelsRevolutionary Swivel Vertical Axle, Safe Protection for All Floors Including Hardwood, Set of 5

Brand New Design: revolutionary Swivel Vertical Axle, bearing protection cover, blocking hairs, wools, etc. Universal Stem Size: Diameter 7/16(11mm, Length 7/8(22mm, Fit 99% office chairs. (exclude IKEA’s Floor Protection: polyurethane wheels protect all types of floors including hardwood, laminate, vinyl, tile, carpet. High Quality Material: strong high hardness 100% nylon bracket, high quality double ball bearings design, all metal bearing rod. Simple Installation: just pull out the old casters and insert the new, pushing them in until they lock firmly into place, no tools needed. Package: Set of 5 Silicone Wheels Stem Diameter: 7/16(11mm Stem Length: 7/8(22mm.