Guildrey Threaded Caster, Swivel Stem for, Set of 4 Office Chair Wheels Twin Caster Wheels with Locking Brake. Guildrey Swivel Caster Wheels Threaded Stem Caster Wheels with Brake. 🔧GOOD FOR FLOORS - The Screw Stem Caster Wheels are made with Nylon, Designed to Protect Hardwood, Carpet, Tile, Slate and Other Floors, Smooth and Quiet Rolling for Floors, Good Traction.
eBay