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