Virco® 3018 CLASSROOM FURNITURE Martest 21® Classroom Chair Sturdy tubular steel chrome finished legs permit compact stacking and include leveling glides. Martest 21 surfaces are made from an extremely durable resin plastic that resists warping, fading and chipping to stay attractive and neat for years. Measures 18-5/8"W x 21-1/2"D x 30-1/2"H. Seat is 18-1/4"H. Black finish. Sold in cartons of 4. Lifetime Warranty* ? (*For Virco products manufactured after January 1, 2014) .