Specially-designed Sliding Rings Lock The Seat At Each End Of The Sliding Rails. * Seat Glides Over Polished High-strength Aluminum Tubes. * Wide Cut-out Seat Allows For Easier Personal Cleaning. * Rust-proof Lightweight Aluminum Construction. * Adjustable Height To Fit User And Bathtub Clearance. * No Tools Necessary For Assembly. * Replaces Items 61391 & 67391. * Note: Cut-out Seat Is Not Intended For Over-the-toilet Use. It's Designed For Personal Cleaning Purposes Only. Specifications: Seat Size: 17.75 X 14.75 Seat Height: 18 - 22.25 Base Length: 48 - 49 Base Depth: 18.25 - 20 Max Tub Clearance: 18.5 Back Height From Floor: 32 - 36 Weight Capacity: 300 Lbs.