Product Description At Mastery Mart, we are committed to provide: A better quality and safer product to customers around the worldTraditional and modern stylish designs that fit every needs of every familySatisfied customer relationship that grow along with our business A decent chair base replacement for every office chair or game chair. Heavy Duty Chrome Base Stool The reinforced metal and durability of the base will ensure your chair’s base is firmly sound for many years. Universal Standard Size Fits almost every swivel chair and rolling stool in the market, with a standard 2″ (50mm) center hole to fit perfectly standard 2″ diameter gas lift cylinder. Universal Standard Size Standard Caster Sockets: 7/16’’ x 7/8’’ (11mm x 22mm). It fits most regular caster stems. Premium Grade Metal This Chrome Base Stool is manufactured of premium polished metal which shows a good sheen. SIZE DETAIL: Color: Matte Black Size in Diameter: 28’’ (70 cm).Height of the Base: 4’’ (10 cm)Standard Gas Cylinder Socket: 2’’ (5 cm).Standard Caster Sockets: 7/16’’ x 7/8’’ (11mm x 22mm).Black Base Leg Length: 12.6’’ (32 cm). More about this item Durable and Heave Duty Supports 2200+ LBS (1000KGs) ANSI / BIFMA Certification Easy to Replace and Install Quality Guaranteed STEP 1 Press the caster wheels into the new base. STEP 2 Insert the gas lift cylinder into the new base. FINISHED! You’ll get a durable and firm modified chair!