CLASSIC FLAPPER: The Korky Classic Flapper is designed to stay open longer to fit old 5 and 7 gpf toilet models. Includes flapper and stainless steel chain. TOILET FLAPPER: The flapper collar allows for attachment to brass flush valves and can be removed to fit plastic flush valves. LONG LASTING CHLORAZONE red rubber. This toilet part replacement includes the classic flapper & stainless steel chain. WHY KORKY: Our high quality toilet products are universal & specific to both older & modern toilet models. Our repair parts are easy to install & made exclusively from long lasting chlorazone red rubber. REPLACEMENT TOILET PARTS: Try Korky Toilet Repair because we continue to commit to designing toilet repair parts that are unviersal to fit the majority of toilets. Designed & manufactured in Wisconsin.