Helm Seat Replacemen Nylont Bushing Quantity in Basket: None Code: TOD999472 Price: $20.99 Shipping Weight: 1.00 pounds Quantity: HELM SEAT NYLON BUSHING- For 2-7/8" OD diameter seat pedestal posts. Prevents abrasion between mounting hardware and pedestal. Necessary for smooth operation in turning chair top. Will fit all brands of chairs with 2-7/8" OD pedestals.