Suggested for people with arthritis, knee or hip surgery, bending or stretching limitations. Elevates toilet seat 5 inches (12.7 cm). Locking knob for secure fit. Protected by Microban - helps prevent the growth of stain- and odor-causing bacteria, mold and mildew. Keeps the seat cleaner longer Lightweight, tool-free assembly Supports up to 350 lbs (159 kg) Latex free.