HIGH BACK CHAIR SEAT: 40 DENSITY MOLDED FOAM WITH LEATHERETTE CUSHION BACK: 40 DENSITY PU FOAM WITH LEATHERETTE CUSHION ARM REST : ZYTAN PU ARM REST. MECHANISM: SYNCHRO MECHANISM WITH SINGLE POSITION LOCKING SYSTEM FITTED WITH THE BOTTOM OF THE SEAT. GAS LIFT: 100MM HIGH POWER GAS LIFT FOR HEIGHT ADJUSTMENT. BASE: M.S POWDER COATED METAL BASE WHEELS: FREE REVOLVING PRESS SYSTEM NYLON WHEELS. COLORS AVAILABILITY : BLACK, BROWN, AND WHITE.