Aqua Flies Aqua DiscsAqua Discs are an easy addition to a tube fly. Made of brass, the disc gives the fly a little weight to help the fly get down in the water column. Our slotted discs will give soft materials more life in the water. Unlike solid discs that create resistance in the water, the slots in the Aqua Disc will make it easier to lift the fly out of the water while casting. Designed to fit the Aqua Flies 1. 8mm poly tubes 12 per package