Perfect for any classroom space, these innovative, school stack chairs are built for comfort and durability. The 12" seat height is perfect for children ages 3 to 7 years old. Stack chair features a molded plastic seat with vented back for comfort, reinforced ribbing in back and under the seat for added strength, and steel lower back support. Frame and screws do not penetrate through the seat surface. Chrome chair legs are equipped with nylon swivel glides perfect for hard floors.