Get ready to party with this 2-to-1 adapter which allows you to double up on any extraction experience. Featuring two female connections and one male connection, this piece is ready to attach to any water piece in your collection. Alternatively, use a plug on one end to use as a pass-through adapter which allows you to clear your glass of vapor without handling your extraction device. 14mm: Features two female 14mm connections and one 14mm male connection 19mm: Features two female 19mm connections and one 19mm male connection