These 17-1/2" plastic stacking chairs with casters have 16-gauge, tubular steel legs with a 5/8" melamine, resin and solid plastic seat and back that won’t scratch or stain. The chair frame is made of bright nickel-chrome steel. Student chairs are available in five sizes and eight contemporary colors. Specify color of seat and back and choice of nylon or steel glides when ordering. An optional bookbasket is also available.