High-back swivel chair features a heavy-duty mesh seat and mesh back that provides superior comfort with contemporary "Y" design, adjustable lumbar support and air circulation. Two-paddle control provides one-touch seat-height adjustment and five back-lock positions that let you adjust the chair to meet your specific preferences. Synchronized tilt control provides reduced front edge rise while reclining, and a convenient back lock prevents the back from reclining when desired. Fiberglass-infused, reinforced nylon base with high-performance casters delivers strength, support and comfort. Adjustable arms are sold separately. Weight capacity is 250 lb. Chair exceeds ANSI/BIFMA standards and is Green-Guard Certified.