FLUIDMASTER SEAL *Replacement seal for Fluidmaster fill valve 400A (Ace no. 40395), 400AK (Ace no 4171294), 400C (Ace no. 49345) 400CS (Ace no. 4137055), 400LS (Ace no. 4148623) *Easy repair *Extends valve life *Card of one seal Replacement Rubber Diaphragm.