The base is made of high-quality aluminum alloy, and the surface is polished. The design to reinforce the base. The load capacity is stronger, and it can withstand up to 2500LBS, which office chairs satisfy the strongest industry standards (BIFMA and ANSI) The material is robust and lengthy not easy 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 provide for customizable foundation color. Chrome, coated, brushed, polished, and so forth.If your chair base is bent, cracked or broken, save money by purchasing our durable aluminum orhigh sturdy replacement iron five-legged chair base as contrasted to the painful purchase of a brand-new chair! We are a manufacturer, therefore we'll provide you the best deal possible to save you the most amount.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.