Folding toilet frame is a one piece plastic seat with a clip-on metal sub-chassis. Padded back rest added for extra comfort. Legs are height adjustable, and the seat has a cut away for personal hygiene. Replacement screw down feet (set of 4) available. Seat height 17"-22". Rail height 24.5" to 29.25" in 1" increments. 19.5" wide, 16.5" deep. Seat opening is 12" x 9". Supports up to 279 lbs.