Replacement Hardware Repair Kit for Office Chair Gas Lift Cylinder - S4451-K Hardware repair kit for office chair gas lift cylinders Contains: 1 Rubber Bumper, 1 Silver Washer, 2 Black Washers, 1 White Bearing Pack, 1 Retaining Clip Attachment hardware for lower area of office chair gas lift pneumatic cylinder These parts fit the large majority of standard gas lift cylinders in office chairs - Most but not all Note: Gas lift piston in picture is for visual purposes only and is not included. Only the hardware kit is included.