Solid Die Cast Aluminum Chair Base Ideal for Executive And Swivel Chairs Satin Polished Leg Tops Aluminum Base Satin Polished Leg Tops Will Never Rust Like Chrome Plating SteelFits Most Standard Size Gas Lifts - 38mmMeets BIFMA Office Chair Testing for Quality Office Components

Specifications 

660mm Outside Diameter 50 mm Center Hub Opening/ 2"- Most Common Size Uses Grip Neck Style Casters with 7/16" x .86" Long Stem

office chair footbase-XD-D5