3" Flush Toilet Seal Kit. Specific fit for dual flush seals: AquaSource, American Standard, Glacier bay and Mansfield Dual flush seal fits: AquaSource (T801, EL205, 0400DF), American Standard (4339, 4348, 4349), Glacier Bay (N2316, N243OE, N2420, N2428R-DF, TL-6900-EW) and Mansfield (178)