This is a great siphon which can be used for bottling as well as racking. The automatic shutoff is designed to fill to a set depth in a bottle, and shutoff once it reaches that level. The bung is tapered to allow for use with multiple vessels. This will work with neck openings from 1.25 - 3" Diameter. Has a 4 ft long 1/2" diameter tubing coming off the top. Extendable racking cane can reach 31.5" deep.