Kore Design LLC Teen/College Active Sitting Height Adjustable Lab StoolCategory: Koru DesignFeatures: -The ultimate active sitting stool! Rock, swivel and move; exercise legs, back and abdominal muscles which will help relieve soreness and stiffness, adjustable height from 18.0” to 25.0”. -Gently rounded ergonomic base allows you to move and flex while seated which can increase comfort and productivity. -Counter-balanced stable base safely moves with you and rests naturally upright so you can sit normally without rocking or balancing, rubberized coating is non-skid, non-scratch and grips most surfaces. Frame Material: -Metal. Base Finish: -Black. Seat Finish: -Black. Seat Material: -Plastic. Dimensions: Overall Width - Side to Side: -15". Overall Depth - Front to Back: -15". Overall Product Weight: -16.25 lbs.