Mansfield Traveller / Sealand / Dometic spare part. Includes 1 rubber flush ball seal & 1 rubber bowl seal. For use in gravity flush toilets from 2000 and earlier with overflow holes inside the toilet bowl. Suitable for toilet models 510, 511, 910, 911, 911-M28, 912-M28, 913-M28, 980, 2010 & 2011. Outside Diameter: 7". Dometic Part Number: 385316140.