The Bush Business Furniture Custom Comfort High Back Mesh Executive Office Chair offers a quality seating solution at an affordable price. Customization features include a convenient lever that instantly adjusts the chair's height, a backrest with cushioned lumbar support that can be moved up or down to provide personalized ergonomic comfort, and a tension knob underneath the seat that turns to change the rate and ease of recline. The height, width, depth and angle of the armrests can also be set to the perfect position for your next project. The high back design limits strain on the shoulders and neck for long-lasting support. The heavy duty nylon base withstands years of use and allows the computer chair to support up to 275 pounds. This commercial-grade Ergonomic Office Chair is tested to meet ANSI/BIFMA quality standards for safety and performance and is backed by a 5 Year Warranty.