1: Mid back swivel office chair;black and grey nylon frame; 2: Seat is fabric on the surface and 12mm plywood with 45 density mould foam inside; 3: Armrests - 2 options: PU fixed armrests or height adjustable; 4: Tilt and one position lock mechanism; 5: 330mm nylon five-star bases,φ60mm PU caster; 6,KGS Class 4 gas lift.