Fluidmsater PROSAEL Pro Series Kohler and American Standard Flush Valve Seals 3-Pack. Pro replacement seal multi-pack comes with 3 easy to install seals. Here the PROS3K is designed to fit American Standard Champion 4, 4 Max, Pro and Eljer Titan 4 flush valve toilets. Prevent or stop leaks from your specialty flush valves. Durable silicone seals last up to 10x longer than standard materials. Chlorine and hard water resistant with a 1 year warranty.