This item is #2 in the picture.
The Better-Bottle® SimpleFlo™ Valve, Racking Adapter and Pail Adapter make up the first valve system that addresses the specialized needs of home winemakers and home brewers. Now, it is possible to rack and bottle professionally without siphons or pumps. The SimpleFlo™ Valve has a simple flow path, to prevent clogging, and is simple to operate, disassemble, and sanitize. The components are made of an incredibly tough, proprietary PET that does not stain or impart flavors.
The Carboy Racking Adapter is especially popular with winemakers and brewers who ferment on shelves, because carboys can be racked without having to move them to a surface with head room for racking canes.
Note: If you are using this with a ported Better Bottle Carboy you will also need a Racking adapter, which is sold separately.