Features an adjustable seat height in 2" increments, these wiggle stools grow with your students and eliminate guesswork. An extra thick padded seat allows for comfortable all-day use. The tamper proof adjustable height reduces distractions and help promote a focused environment. The rubberized non-skid base is angled for improved posture and provides stability, even when over-tipped. Adjustable height 12" - 18". Black