Usage Tips:Include 2 Pcs 385311462 and 2 Pcs 385316140.Compatible most pedal-flush D0metic or or or VacuFlush and Travel Trailer brand toilets that do not include overflow holes inside the toilet bowlFit 506 or 509 or 510 or 511 or 511H or 547 or 548 or 706 or 709 or 748 or 749 or 806 or 808 or 847 or 848 or 1147 or 1148 or 2010 or 2011 or 5006 or 5047 or 5048 or 5049 or EcoVac 146-149 or VacuFlush 168 or 606 or 647 or 648 or 1006 or 1008 or 1047 or 1048 or 1049 or 1106 or 5146 or 5147 or 5148 or 5149Made of high quality rubber,keeps the water in place and the stink out, high performance,soft,durable,anti-Friction,good tightness to seal properly,no worry about leaking.Colour:blackMaterial:Silica gelPackage Contents:4 x RV Toilet Bowl Leak SealOnly the above package content, other products are not included.Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is 1-3cm.