Upgraded Solid MetalL: Crafted from premium chrome using advanced manufacturing technology, the Sytopia chair base is ANSI and BIFMA certified. It supports over 2400 lbs (1088 kg)nearly 5 times the standard 500 lbs capacity. Ensure Stability and Safety: Designed with a 28'' wide base and low center of gravity, it offers enhanced stability and helps prevent accidents like tipping or fallingeven under heavy use. Fits Most Chairs: Compatible with standard 2 (5 cm) gas cylinders and 7/16 x 7/8 (11 mm x 22 mm) caster sockets. Works with most office, gaming, computer, and executive chairs on the market. An Economical Shopping Choice: No need to replace your entire chair if only the base is damaged. A replacement base saves money and extends the life of your favorite chair. Customer Satisfaction Guaranteed: Easy to install with the included instruction guide. If it doesnt fit your chair, feel free to return or exchange ityour satisfaction is our top priority.