Kohler K4418 Tank Repair Kit OEM Parts Style:Include Metal Plate View and order under that

View and order under that part number to see current available color options in stock

Lid Size: 18" x 8"

That tank is a slightly different shape and size

Tank P/N: 404551

Tank P/N: 3340 #1

Kohler K4418 Tank Repair Kit OEM Parts Style:Include Metal Plate View and order under thatManufacturer: KOHLER OEM Parts This repair kit is designed by Kohler for the tank K4418. It includes all new internal parts necessary to rebuild the K4418 tank, including the fill valve, Aquapiston canister flush valve, chrome colored trip lever, tank to bowl washer, and brass bolts. The metal plate is optional for an additional charge, or you can reuse the one from your original tank.