Mobile guest chairs with arms stack up to five high for use in meeting rooms, conference areas, cafeterias and reception areas. Molded seat underpans protect seat fabric when stacked and give a finished appearance. 20-1/4" wide x 19-3/4" deep seat is made of compound-curved blow-molded plastic and a 3" thick urethane foam cushion. Polymer arm caps have gently sloping, wide top surfaces for maximum comfort. Inverted U construction features 1" 14 gauge steel tubing that runs through polymer arm caps for exceptional rigidity. Usable depth between arms is 16-3/4". Mobile guest chairs have fully upholstered fan backs with a 1-1/2" thick urethane foam cushion. Upholstery is made with 50 percent polyester and 50 percent acrylic fabric with fabric protector. Guest chairs roll on 2" hooded dual-wheel casters and are available in black frame only. Certified by SCS to be in compliance with specific, indoor, air-quality emission requirements. Meets or exceeds ANSI/BIFMA performance standards.