HERCULES Series Heavy Duty, 3'' Thickly Padded, Upholstered Stack Chair Gray/Fabric Color Gray; Heavy Duty .75'' Square Tubular Frame; Plastic Bumper Guards; Multi-Purpose Stacking Chair; Silver Vein Powder Coated Frame Finish; .625'' Stretcher Bars in Front and Back provide Extra Support; CA117 Fire Retardant Foam; 18-Gauge High Carbon Steel Frame; Frame Silver; Length 21; Width 19.75; Assembly Required NO; Material Steel; Height 31.25 Limited Lifetime Warranty on Frame Stacks 12 Chairs High Plastic Floor Glides Thick High Density Foam over .625'' Thick Plywood Seat and Back