The surface of the base has just been polished, and it is composed of a superior aluminum alloy. the base's reinforcement design. The office chair satisfies the highest industry standards for office chairs thanks to its stronger especially military of up to 2500LBS (BIFMA and ANSI) The item is robust and resistant to deformation. We will put forth every effort to maintain our customers' high level of uncompressed quality satisfaction.Size] The base of the office chair is suitable for most chairs on the market (office chair, game chair, office chair, executive chair). Casters 7/16 inches x 7/8 inches (11 mm x 22 mm) and gas cylinder 2 inches (5 cm)We have our own automatic powder coating workshop and can produce different colors and different surface processes according to your requirements.We support customized color of our base. Polished, Chrome, Painting, Brushed and so on.If your chair base is bent, cracked or broken, save money by purchasing our durable aluminum or iron five-legged chair base replacement heavy duty instead of the painful purchase of a whole new chair! We are a manufacturer and we will provide you with the most affordable price that can save you the most.We have a team of professional designers who are able to provide product customization services. With our vast experience working with diverse clientele, we are confident in delivering customized solutions that meet any of our client’s objectives effectively and efficiently.