This duckbill adapter replacement is specially designed for Model 503, ensuring seamless compatibility with various toilet systems The flexible silicone materials allows for easy installation without additional tools, perfect for enthusiasts The unique structural design effectively reduces flushing noise, ensuring undisturbed use at any time Ideal for households with children or elderly family members, enhancing living comfortable The smooth surfaces design prevents dirt buildup, making daily cleaning effortless Simple wipe keeps it hygienic, saving time for busy modern households Made from good silicone, this adapter excellent wear resistance and properties It maintain sealing even with frequent use, reducing leakage risks for bathroom protecting flows control helps reduce water consumption per flush while maintaining strong flushing power Perfect for users looking to living and lower water bill, Manufacturer: ZBIianxer