Replacement seals for Thetford C2, C3, C4, C200, C250, C400 and C500 cassette toilets. Reference part number for toilet seal: 23721. Applicable models: Suitable for Thetford C200, C250, C400, C500, C2, C3 and C4. Please note that this product is only compatible with models manufactured after June 2000. Seal diameter: 110 mm. Easy to install; replaces damaged parts directly. Important: Before purchasing, check the used part and its original OEM part number and carefully verify that your vehicle model is listed in the product catalog (note the year) to ensure that the kit meets your needs. { \"product_title\": \"Lip seals for Thetford C2 C3 C4 C200 C250 C400 C500 cassette toilets - compatible replacements [GPA]\", \"product_description\": \"Replacement lip seals for Thetford cassette toilets, compatible with models C2 C3 C4 C200 C250 C400 C500. Toilet lip seal, reference part number: 23721. Applicable models: Compatible with Thetford cassette toilet lip seals C200 C250 C400 C500 C2 C3 and C4 models. Please note that this product only applies to models manufactured after June 2000. Lip seal diameter: 110 mm. Easy to insert and install, replaces damaged parts directly.\" Important: Before purchasing, please inspect the used parts and verify the original OEM part number. Also carefully check if your vehicle model is included in the product description (pay attention to the model year) to ensure that the kit meets your needs.