Blow-molded plastic seat and back with textured finish. * Seat platform slides smoothly over polished high-strength aluminum tubes. * Comes with safety straps. * Optional armrests attach easily. * Adjustable in height to fit both user needs and bathtub wall clearance. * No tools necessary for assembly. * Specifications Seat Size: 20.25 x 18.5 Seat Height: 19 - 23 Base Length: 53.5 - 54.25 Base Depth: 20.75 - 22.5 Max Tub/Toilet Clearance: 19 Back Height from Floor: 33.75 - 37.75 Weight Capacity: 350 lbs.