Universal size: The office gamer chair base diameter is 28 inches, with standard center hole (2 inch), universal caster socket size (11 mm x 22 mm). Applicable to almost all gaming chairs and office boss chairs Durable nylon: The material of this gaming chair base is nylon, which is more durable and stable than metal. Durable nylon material provides a strong chair base Smooth and quiet rolling: The chair wheel base set comes with 5 casters that glide quietly and smoothly on any surface. Does not scratch the floor when rolling Perfect match: Perfect match with gaming chair, the same exact style base. it is the perfect replacement for gaming chair base Service: If there is any problem with the gaming office chair base set, we will solve it for you in time Gaming Chair Base Replacement