Description Universal 3.5-Inch Toilet Flapper Valve – Includes Two Replaceable Silicone Seals for Long-Lasting Performance Compatible with most one- and two-piece toilets Designed to fit American Standard Cadet 3 models Resistant to calcium buildup and easy to clean Constructed with durable, high-quality ABS for long life Features a floating silicone seal to effectively stop toilet leaks Simple, DIY-friendly installation Made with chemical-resistant soft polymers to ensure a reliable, long-lasting seal Premium performance—one of the best 3.5-inch flappers available.  We make our flush valves out of the finest Polymers money can buy. Our flappers are designed and made so you can remove and install replicable silicone seals. Most silicone seals are about $10 apiece. You can take them off and wash them in vinegar and never have to buy a flapper again.