NuFlush, Flush Valve for Two Piece Toilets with a Glacier Bay type fill valve Repair Kit. The kit includes: 3 flush valve, Glacier Bay type Tower fill valve and our Overflow extension tube. The Glacier Bay Type fill valve fills the toilet tank quickly and quietly after being emptied by a flush. The adjustable Fill Valve can adjust the Water height from 7 to 14 inches. NuFlush overflow extension tubes, The overflow extension tube is designed to increase the volume of water used per flush. Make sure to include the diameter of overflow tube in your Toilet. The flush valve is designed for two piece Toilets with a 3 flush hole with rubber grommets, Stainless Steel Bolts and Nuts needed for installation.