Chair Base Replacement, Heavy Duty Office Chair Replacement Parts 28'' Plastic Desk Chair Base Replacement with Universal Gas Cylinder Hole and Casters Sockets (2200Lbs)Feature: --Office Chair Base 28''(71cm) The heavy duty chair base is reinforced and wide enough to prevent sway. --Low Gravity Center Design The base designd with a low center of gravity achieves stability and safety. --Standard 2" (5cm) Center Hole The hub accepts standard gas lift cylinders, which is fit for most chairs. --Universal Socket Size of Casters The socket is acceptable for casters 7/16’’ x 7/8’’ (11mm x 22mm) --Easy to Install It is extremely simple and convenient to install and operate. Just assemble the five feet and the center plate directly together and then secure them with screws. Only spend 5 minutes, you can get a new office chair base, saving you the cost of buying a new chair. --Wide Application The chair base replacement parts are suitable for most of the chairs on the market, such as office chairs, computer chairs, gaming chairs, executive chairs.Specification: Name: Office Chair Base Material: Plastic Color: Black Size: 28 Inch Package Includes: 1×Office Chair Base Tips: --If you have any problem, please feel free to contact with us, we will offer you satisfactory service.