The Adjustable 3" 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" to 11-1/2", 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" 2-piece toilet tanks, but does not fit any Kohler toilets. Easy to install.