Hydroven Insert Half Leg 20 Rollators Specially designed sliding rings lock the MSHQ BJ215451LXR Specially designed sliding rings lock the seat at each end of the sliding rails * Seat glides smoothly in and out of the bathtub or shower over polished high strength aluminum tubes * Comfortable molded plastic seat with textured finish * Rust proof lightweight aluminum construction * Adjustable height to fit user and bathtub clearance * No tools necessary for assembly * Seat Size: 17 Highly Accurate Half Leg 20 length * Single chamber inflatable expansion inserts to increase the circumference compression * HCPCS Code: A9900 * Inches added to Calf 6 Wrist 6