Product size: This product contains two different sizes, the small gasket size is 30mm inner diameter, 47mm outer diameter, and 2mm thickness; the large gasket size is 46.5mm inner diameter and 66mm outer diameter, and 2mm thickness Compatibility: This product is compatible with Grohe Adagio 43808000/43544000 pistons Product effect: Replace the seal on the flush valve to achieve more efficient flushing and water saving. The O-ring seal can also prevent odor from flowing out of the sewer pipe and prevent sewage leakage. Easy to install: These toilet tank seals are easy to install, plug and play, and can be directly replaced without adjustment, with perfect compatibility and high reliability Product list: Product include a total of 2pcs 66x46.5x2mm Sea.