Feature:1. Applicable Model: The RV toilet flush seal is replacement for Dometic 300 310 320 RV motorhome trailer toilets. Please confirm whether it is consistent with the product you need.2. OE Number: The part number for reference is 385311658. Please confirm whether it is consistent with the OE you need to avoid wrong buying and other problems.3. Perfect Sealing: The RV toilet flush ball seal promotes the benefits of security, ensuring a leak proof mechanism, preventing water from accidentally flowing for a better flushing action.4. Premium Material: RV toilet flush seal gasket ring is made of premium rubber material, durable and reliable, high strength and wear resistant, providing you with a long lasting use.5. Easy Installation: Installation takes only a few minutes. Simply pop out the old seal and place the new flush ball seal in, making sure it is fully seated.Specification:Item Type: RV Toilet Flush Ball SealMaterial: RubberOE Number: 385311658Fitment: Perfect replacement for Dometic 300 or 310 or 320 motorhome, and trailer toilets. Does not fit for 210, 510 or other models not mentioned..Package List:2 xRV Toilet Flush Ball SealNote:Please double check the part number of your item, matching information is for reference only.