The Fluidmaster 510M replacement seal stops leaks from Mansfield #210 and #211 specialty flush valves. Durable silicone construction lasts up to 10 times longer than standard rubber seals and resists deterioration from chlorine and hard water.

• Fits Mansfield flush valve models #210 and #211
• Silicone construction lasts 10x longer than standard rubber seals
• Resistant to chlorine and hard water damage
• Stops toilet tank leaks from worn or deteriorated seals
• Easy installation - no special tools required