Heavy Duty Boss Office Chair Base Part Replacement, 28-Inch Nylon Gaming Chair Product Features [Universal size] The office chair base diameter is 28 inches, with standard center hole (2 inch), universal caster socket size (11mm x 22mm). Applicable to almost all gaming chairs and office chairs [with 5 Casters] The package includes a set of replacement chair bases, 5 chair wheels, installation Package [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. It can load up to 500lbs. [Smooth and quiet rolling] The desk chair base casters use precision ball bearings to provide smooth and quiet movement. [Perfect match] Perfect match with gaming chair, the same exact style base. it is the perfect replacement for gaming chair base Shipping: Shipping is complimentary within the lower 48 US States. We Do Not Ship to PO/APO Boxes, HI or Alaska We Do Not Ship Outside of the Continental US All items ship within 24-72 hours of Payment For large items that require Freight shipping a valid phone number is required to call and schedule your delivery Terms of Sale and Feedback: Feedback is extremely important to us and If you are satisfied with our transaction, please take a moment to leave Positive Feedback. YOUR Satisfaction is our #1 Priority! If there are any issues, PLEASE contact us BEFORE leaving a neutral or negative rating so that we may resolve any concerns. We PROMISE we can make you happy if you give us a fair chance. Returns / Concerns: All items qualify for returns within 14 - 30 days of receipt. Buyer is responsible for return shipping on any item that is not damaged Please be sure this is an item you want before making your purchase. Customer Satisfaction is our TOP priority! All items are IN STOCK at time of listing. Inventory changes constantly and it is impossible to maintain a perfectly accurate count of all items. Please do not penalize us if we have to issue you a refund! Thank You For Your Business!