Segmented active stool focuses minds at any height. Five tiers easily nest for fast adjustment, while the bottom tier is rounded for slight rocking motion in any direction. Slight instability encourages movement and works core muscles, improving concentration and focus on tasks at hand. Add or remove the middle three segments to adjust the stool from 6"H to 16"H in 3" increments and find the perfect height for most users in seconds. Adjustable height also allows stools to be versatile in various classroom situations. Stack all 5 segments for an active seating at a desk, or remove the middle 3 for wobbling floor seating for breakout sessions. Durable EVA foam is comfortable for extended periods of use and lasts for years. Supports up to 220 lb. 16”H x 11” dia; 4 lb. Available individually or in a Group Set of 6.