Hello there! Thank you for your query regarding the Delta 2559-CZMPU-DST deck-mounted bathroom faucet. There are two kinds of gasket for this faucet. The Delta RP73814 and the Delta RP51243 gasket. However, the Delta RP51243 gasket is not yet available on our website. It is best to contact one of our knowledgeable customer support specialists at 435-868-4020 between 8:00 AM and 7:00 PM MST or via email at support@plumbersstock.com. They will be happy to assist you further. You may refer to this parts list for more information. Once you’re ready to purchase, simply click "Add to Cart" and provide the information needed. Have a great day!