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(item# 71002) Attach Easily. Adjustable In Height To Fit Both User Needs And Bathtub Wall Clearance. No Tools Necessary For Assembly. Replaces Item #67993. Specifications: Seat Size: 20.25 X 18.5 Seat Height: 19 - 23 Base Length: 63.5 - 64.25 Base Depth: 20.75 - 22.5 Max Tub/toilet Clearance: 19 Back Height From Floor: 33.75 - 37.75 Weight Capacity: 350 Lbs.