Lightweight, rust-free aluminum construction. Patented self-lift design utilizes user\'s weight to lift up. Multi-user capability, no weight adjustment needed. Large, high density PU foam seat. Fully covered foam armrest and full size PU backrest. Adjustable seat heights: 18.5 inch to 23.5 inch in 1 inch increments. Easy to set up, requires no tools to assemble. Suction tips come standard. One pail with lid and one spray guard included. Can be used as an over-the-toilet seat.