Description:Functional Replacement: This toilet lip seal is designed to be compatible with all Thetford toilet cassettes, providing a durable and long-lasting solution for your RV toilet maintenance needsEasy Installation: With the 23721 model number, this lip seal fits perfectly in Thetford C200, C250, C400, C2, C3, and C4 toilets manufactured after 2000, making it a convenient and hassle-free replacement optionDurable Performance: Made of materials, this seal ensures a tight and leak-proof fit, keeping your RV bathroom clean and dry during your travelsCompatible : Say goodbye to leaks and odors with this dependable Thetford toilet lip seal, offering a reliable solution that will last for many trips to comeReliable Replacement: Trust in the compatibility and durability of this seal, designed to provide a functional and secure solution for your Thetford toilet cassette needsSpecification:Color: BlackMaterial: RubberPART NO:23721The Full Diameter is 110mmThe inner diameter is 77.3mmFits all C200/C250/C400/C2, C3 and C4 models produced after 15th/June/2000Package Includes:1*Toilet Cassette Lip Seal