https://www.acehardware.com/departments/plumbing/toilets/toilet-repair-parts/4091989
Fluidmaster Toilet Flush Valve Black Plastic For Universal Mfr# 507AP7 - Ace Hardware
Flush valve kit for pre-1994 model toilets that use 3.5 gallon per flush toilets or more. The flush valve controls the water within the tank and the flapper...
toilet flush valveblack plastic