High Back Ergonomic Executive Chair Model: CKC-FL-311 (1) Fabric: Made of high-quality Yida mesh fabric, with good abrasion and stain resistance; color options available; (2) Accessories: Made of high-density, high elasticity polyurethane sponge that is better than or equal to 35 #, can prevent oxidation and breakage, has moderate softness and hardness, good resilience, and is not easily deformed; (3) Plastic: Made of nylon plastic, high tensile strength, one-time molding; (4) Function: Can be freely accessed and locked; (5) Air rod: Made of 100 # sinking 5 spray SGS certified air rod, with a thickness of 2.5 and a third level BIFMA inspection of Weiyas air rod, with a 1 year parts warranty. (6) Chassis: 3.0mm thick heavy-duty chassis with tailboard; (7) The armrest can be raised and lowered“