This stack chair provides flexibility and support in classrooms, lecture halls, dining areas, seminar settings, administrative environments and libraries. This stack chair features a contoured seat with built-in lumbar support and a heavy-gauge 7/8" tubular steel frame. In addition to a standard adult-sized unit with 17 1/2" seat height, the I.Q. line offers chairs with 13" and 15 1/2" seat heights that are ideally suited for younger, smaller students. Quick Ship color combinations: Chrome frame with Navy, or Black seat.