Works with the Large 1/2″ Auto Siphon. Clamps to Buckets, Carboys and Gallon Jugs. Holds Auto-Siphon securely above sediment. Snap on, slide down, snap off. Also has a handy top loop to hang your bottle filler if you need to take a break during a filling session. Auto-siphon, bucket, carboy, jug and tubing not included.