5 - 8 years. Made with rugged polypropylene shell seats and sturdy matching powder-coated steel legs. Chairs are steel-braced on the underside for extra stability, and nylon-tipped feet help protect classroom floors. Measures 29"H x 19"W x 18"L and has a 150 lb. weight limit. Factory second item, contains minor imperfections -- you probably will not notice! Same high quality at a great low price. Due to these discounted prices we cannot offer our standard warranty. All Sales Final - No Returns. Limited Quantity!