Dealing with a leaky toilet? This Mansfield Korky red valve seal is exactly what you need to fix that annoying problem once and for all. Measuring 5x4x3 inches, this replacement seal fits perfectly on #210 and #211 flush valves. What makes this one special is the red chlorazone material that's specifically designed to withstand harsh water conditions and chemicals without warping or swelling like regular seals do. Korky has been making quality plumbing parts for over 50 years, so you know you're getting a reliable product that plumbers actually trust. Installation is straightforward - just remove the old seal and pop this one in place. No more constant running water or those subtle leaks that drive up your water bill. The red rubber composition is durable and long-lasting, meaning you won't be dealing with the same issue again in a few months. Whether you're a DIY enthusiast or just someone who wants to handle basic home repairs, this valve seal makes toilet maintenance simple and effective. Keep one on hand for emergencies - because toilet problems always seem to happen at the worst possible times!