Students strengthen their core while rocking on the coated rubber base. The design also opens the hips to increase blood flow and promote better posture while sitting in class. A padded, inlaid foam seat offers extra comfort. Multi-functional stool quickly adjusts via an easy-to-use handle to accommodate students of most heights. Made from 50% recycled materials. Each stool supports up to 250 lb and is 13"L x 13"W x 18" to 25-1/2"H; 9-1/2 lb. Available in a set or individually. Complete Set includes one of each color. Individual Stools are available in Black, White, Yellow, Salmon, or Turquoise.