Flush Valve Rubber Seal Gasket Replacement for Mansfield 210 & 211, 2 Pack (Mansfield Flush Valve Seal) The Qualihome flush valve gasket for Mansfield will repair your leaky toilet The gasket works with Mansfield models #210 or #211 series Rubber construction provides strength and durability. 2-1/8 in. I.D. x 3-1/8 in. O.D. x 1/16 in. thickness For use in your toilet system, Repairs flush valves, Helps prevent leaks by providing a better seal Premium rubber resists chlorine and lasts longer, Instructions included for an easy installation