Black PU seat. Black PU backrest. 1 lever underseat mechanism allows gaslift seat height adjustment. Backrest height & d epth to seat adjustment available using handwheels underseat & behind backrest. 700mmÌ÷ 5 leg black Nylon base. Available with either 50mm twin wheel castors or glides. Please specify. 510mmÌ÷ chrome & alloy height adjustable footring.