Durable, blow-molded, plastic bench. Wide base, and suction-cup tips on two legs offer extra stability and safety. Direction of seat back can be reversed easily without tools. Anodized, aluminum frame adjusts from 16.5" to 21.5" in one inch increments. Fits tubs 11" to 21.25" deep.1" space in seat for shower curtain.550 lb. weight capacity. Limited lifetime warranty on frame. Six month warranty on handles, feet, suction cups, push buttons, and any "wearable" parts. (Single)