Wide range of uses: gaming chairs, office chairs, strollers, bookshelves, etc. Applicable terrain: hardwood floors, carpets, tiles, laminates, concrete, stone and vinyl, etc. Size: Caster diameter: 60 mm; Stud diameter: 11 mm; Stud length: 22 mm.Before placing an order, it is recommended to measure the bolt opening of the office chair Polyurethane material: wear-resistant, durable, quiet, good performance, load capacity: about 330 lbs (150 kg) Installation: Remove your old casters, push in the new ones Strong load capacity: Five casters with a total load capacity of 330 lbs, they can fully meet the daily needs of most people.Safe for the floor: The chair casters are made of high-quality rubber and touch the floor more gently without scraping the floor when sliding.Sturdy & Durable: The caster has undergone numerous extrusion tests, proving its robustness and durability, which can meet your life and work use.Smooth Scrolling: Are your old casters keeping you from moving? Replace with our chair casters that allow you to glide freely in your living room or office.Quiet: The bottom casters will not make a squeaking sound. Our casters have very low noise, and they are slender so that you avoid the annoyance of noise.Before purchasing, please make sure that your old office chair wheels meet the dimensions shown in the picture above.Pull the old chair casters completely out of the office chair base.Insert the new chair wheels into the socket, until the stem of the chair wheels is fixed.Delivery quantity: 5 piecesProduct color: redProduct size: diameter 60 mmNote: Manual measurement, please allow an error of 1-3 cm.