Lider Commercial Grade Black Leatherette & Chromed Steel Armless Office Chair With its ergonomic shape, padded back and seat cushions, the Lider Plus armless chair works in comfort. It has a chromed steel frame with soft neoprene arm pads. DISCLAIMER: Zuo Modern Contemporary, Inc. is not affiliated with Herman Miller, Inc. and its products are not affiliated with Eames Aluminum Group or Softpad products. . Base Diameter = 24 available with black and white color. Black, Color may slightly different from the pic. Leatherette, Chromed Steel. W18.5 x D24 x H33.5~35, Seat width: 18.5, Seat depth: 18.5, Seat height: 16.5~18 Commercial Grade. Some assemble needed.