The Adjustable 3 inch Flush Valve and Tank to Bowl Gasket Kit fits specific toilet models made after 1997. Quick and easy to install, the flush valve height easily adjusts from 7 inch to 11-1/2 inch, with no tools or hack sawing required. The oversized tube and funnel reduce flood risk while the included premium flapper and tank to bowl gasket ensure a tight, leak-proof fit. The kit fits most 3 inch 2-piece toilet tanks, but does not fit any Kohler toilets. Easy to install, the 5030 includes: (1) Large 3 inch- 4 inch Flush Valve, (1) Large Tank to Bowl Gasket, (1) Large 3 inch Premium Flapper, (1) Set of Hardware and (1) Instructions.