KOHLER K-3988-0 Toilet, White Item may ship in more than one box and may arrive separately Two-piece toilet. Elongated bowl offers added room and comfort. Left-hand nested trip lever offers a choice of 1.1 or 1.6 gallons per flush (gpf). Combination consists of the the K-4198 bowl and the K-4458 tank. Dual-flush technology allows you to choose between a full- or partial-flush.