ESD Chairs, Assembly Chairs with Anti-Static Leather, High strength carbon steel chrome, 5 star foot, durable nylon casters and Conductive metal chain. Available in Black or Blue. Chair/Seat Dims: 430x400mm (16.96x15.75in, Chair/Back Dims: 400x300mm (17.32x11.81in), Adjustable height from 440-600mm (17.32x23.62in). Includes an adjustable pneumatic rod. Surface resistance: 103~106ohms or 106~109ohms, System resistance: less than or equal to 109ohms