Hang tough with the TaskMaster Economy Industrial Chair. With a 15 year warranty it offers an additional 10" of Wave Tube Extension. Ergo knob controls for 3" backrest depth and 3" backrest height adjustment. Each chair features a 5-leg, tubular steel base with high-impact nylon glides for safety and stability. Sturdy, ergonomically correct low-rung polypropylene footrest mounts securely to base. The chair also features a black microcellular, self-skinning polyurethane foam covering. Assembly required.