This shower chair has a height adjustable aluminium frame with moulded plastic seat and backrest. It is both lightweight and corrosion resistant. Supplied flat packed, they are easy to assemble with the tools supplied. This shower chair has a plastic backrest to offer additional support and comfort. Seat height adjustable from 470 to 570mm (18½ to 22½”). Seat width 400mm (15¾”). Seat depth 400mm (15¾”). External width 510mm (20″). External depth 410mm (16″).