The easy to assemble anodized aluminum rails are sturdy and lightweight. Waterfall armrests provide additional support and feature textured plastic arm rests. Powder coated aluminum bracket easily attaches frame to any toilet using existing toilet seat screws. Arms are height and width adjustable for any toilet. Frames will support up to 250lbs. Height Adjustment: 23 3/4" to 31 3/4" Width Between the Arms: 17" to 20"