Metal, Plastic Set of 4 lightweight plastic folding chairs provide commercial-grade, on-demand seating solutions; foldable stack chairs are a smart investment for business and home usage Can be nested or stacked for easy storage, transport, post event cleanup or for routine floor maintenance Integrated drain holes alleviate pooling from spills or rainwater; floor caps won't leave marks and prevent damage to hard flooring surfaces Double support braces combined with an 18 gauge steel frame and textured seat for a stable worry-free seating experience PRODUCT MEASUREMENTS : Overall Size: 17.5"W x 18"D x 31.5"H; Folded Size: 17.5"W x 2.5"D x 38.25"H; Seat Size: 15.5"W x 15.5"D x 17.75"H; Back Size: 17.5"W x 15.5"H; No Assembly Required