office chair part: Our bases are made of high quality steel. The base is painted or electroplated on surface with no dilapidation. We can produce the mould by ourselves, so our products are excellent in quality and reasonable in price.Features: 1) Material: steel 2) Finish: Chrome plated and Powder Coating are available 3) Size:300, 320 and 350mm (from the center to the end) are available 4) Application: chair base 5) Specification: subjected to demand of customers 6) Packing: carton