Chair specifications shown Type: Comfortable office chair. Back: Black mesh back that allows air circulation. Lumbar Support: Clear lumbar support/cotton cushion in the lower back, and it appears to be adjustable. Headrest: Height adjustable, likely with angle adjustment. Armrests: Height adjustable, and appear to have a multi-adjustment mechanism. Seat: Wide padded seat made of fabric/mesh material. Height: Hydraulic lift and lower by gas cylinder. Tilt Mechanism: Appears to have a tilt and lock mechanism, but the number of lock degrees and tilt angle cannot be confirmed from the image. Base: Five-star metal base, appears to be brushed aluminum. Wheels: 5 double/swivel casters. Rotation: 360 degrees. Color: Almost entirely black with silver metal parts.