Innovative school stack chair features a molded seat with vented back, reinforced ribbing in back and under seat for strength, steel legs with steel lower back support. No penetration of screws through the seat surface. Available with nylon swivel glides, perfect for hard floors. 2 Blue, 2 Red, 1 Yellow, 1 Green. Assembled Weight: 4.50 lbs. Assembled Dimensions: 11.90""x 11.50""x 19.50""