Aluminum Bath Benches with Back $40.02 – $92.37 Bath Bench: Aluminum Bath Bench with Back Increased patient comfort comes from the generous, high-density polyethylene seat and back (20″W x 12″D) and angled legs that distribute weight over a larger area. Suction-cup tips on all four legs provide even more stability and safety. Built-in hand grips. Durable anodized aluminum frame is rust resistant. Seat height adjusts from 14.5 – 19.5″ (37 – 49.5 cm).