HIGH BACK CHAIR FEATURES A BACK MADE FROM BLACK PP (POLYPROPYLENE) FIBER BACK AND POLYESTER NYLON MESH, PROVIDING COMFORT AND BREATHABILITY, FIXED PP ARMRESTS, HIGH-DENSITY MOLDED FOAM, A 10MM PLYWOOD, AND A GREY PP SHELL, 1 LEVEL LOCKING POSITION MECHANISM, GAS LIFT IS A 100#6, BELONGING TO CLASS 3, ENSURING RELIABLE HEIGHT ADJUSTMENT, 320MM NYLON BASE, WHICH HAS SUCCESSFULLY PASSED A STATIC TEST WITH A WEIGHT OF 1136 KGS, 50MM GREY NYLON CASTERS FOR SMOOTH MOBILITY. COLOR: GREY Check out our latest executive chairs