Presidents Chairs Range | Gas lifts raise or lower seats | Horizontal seat adjustment, allows the user to fix the depth of the seat | Has synchron mechanism for both the back rest and seat to tilt simultaneously | Lockable mechanism allows the user to lock different pivoted angle positions of the back | Anti-shock mechanism stops the back rest from being thrown forward when the mechanism is unlocked | Height adjustable back rest and headrest | Features a lumbar support | Tension lever allows the user to adjust the tilting tension of the chair according to his or her weight | Adjustable arm pads allow the user to rotate the pads inwards or outwards | Vertical adjustable arms | Soft wheel castors are suitable for both carpeted floors and hard surfaces | Adjustable slide arms, allows the user to slide arms forwards and backwards | Comes in black fabric seat and black mesh back | Arms not included