Our toilet flange Rings provide a stable and waterproof seal for toilet installation and repair projects Make of and rubber materials to ensures long terms and durability The toilet flange Rings comes in a size that applicable to 100-110mm / 3.94-4.33inch pipe inner diameter, making it Ensures excellent adhesion and creates a tight seal to water leakage and escaping The integrated Backflow valves effectively prevents water from flowing back, eliminates the caused by backflow