The base is made of high-quality aluminum alloy, and the surface is polished. The design to reinforce the base. The office chair surpasses the highest industry standards for office chairs thanks to its stronger vital development of up to 2500LBS (BIFMA and ANSI) The item is robust and resistant to deformation.We will take every necessary step to keep our customer in the highly satisfied with uncompressed quality.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.]Instead of spending painstakingly on a brand-new chair if the base of your chair is bent, fractured, or damaged, save money by getting our sturdy aluminum or iron five-legged chair bottom replacement heavy duty! We are a manufacturer, thus we'll provide you the most advantageous deal possible to save you the most money.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.