Tygerclaw high-back executive chair is very suitable for who need comfort when sitting in office or working station. This office chair comes with multiple functions which provide maximum support, ease and comfort for the user. This chair is upholstered in soft and durable PU Leather material for better comfort. The seat height can be easily and effectively adjusted by pneumatic gas lift and 360-degree swivel wheels make this chair more flexible in the working space. With the lumbar support of this chair, you can maintain your inward natural curvature of the lower spine for long working day. Upholstery: Black PVC, CA117 foam Silver coated loop arm with soft pad Locking tilt mechanism Butterfly mechanism Class 3, 100/20 mm gas lift R350 mm silver coated base 50R-PA castors Maximum seating weight=220lbs Meet or exceeds BIFMA 5.1 standard, and ISTA 3A TygerClaw High-Back Executive Chair - Black