Made of premium solid black nylon, thickening material, durable, has strong supporting characteristics. With many commercial offices using carpet tile, waxed concrete or vinyl tile on their floors, a safer alternative to wheels is a must Similar height to most standard wheels. This office chair stool or cloche slides out to turn any office chair or desk into a stationery Comes with an exactly sized anti-abrasion sponge mat for your planing. Perfect for home or business offices and hassle-free. It will withstand years of use. Has a smooth bottom for tile, carpet and other durable flooring. However, for wood, laminate and other types of softer flooring, we recommend placing our sponge mat at the bottom of the slide. Made of high strength nylon, anti-abrasive and leaving no marks on the floor, it will protect your floor and use for many years. No need to buy new expensive chairs, the chair support base will help you solve the problem easily, saving time and money. Specification: Type: Office Chair Slide Tool Material: strong nylon Quantity: 5 pieces Wheel Size: 5*5.8cm/2*2.3"(L*H) Inserted Link Size: 1.1*2cm/0.4*0.8"(W*H) Net weight: 309g Package including: 5 * Office Chair Slide Tool