Use compatible:Toilet Flushers cartridge Parts,Flushmate I - 501/501A Flushmate II - 501B, Flushmate III - 503, Flushmate IV - 504 series.
Included Parts: Includes all components required to tune-up systems
Easy to install:Installed the new flushmatefacility works like new,and made of durable material,OEM manufacturing requirements
The instruction is included, to prevent the Water would not shut off when installed and unable to flush the toilet with it installed,Please read it carefully before installation