1Well Sealed: Our Rv toilet seal kit will provide a tight and reliable sealing performance, making leaks and odors away from your Rv toilet. 2Reliable Construction: The Rv toilet flush seal kit is made of premium craftsmanship and materials, can withstand the daily demands of Rv use, providing long lasting performance and peace of mind. 3Applicable Model: Our premium Rv toilet bottom base seal ensures a perfect replacement for Dometic 300 310 320 Rv toilet models, enjoy a worry free camping experience. 4OE Number: The part number for reference is 385311652. Please confirm whether it is consistent with the OE you need to avoid wrong buying and other problems. 5Easy Installation: Installing our Rv toilet flange seal mounting hardware is quick and hassle free, just turn off the water supply, remove the old bottom seal ring, without the need for professional assistance.