Fits snugly over the mouth of the 5 & 3 gallon glass carboys. The wide spout fits a 3/8" racking cane, and the small spout can fit 3/8" tubing for a blow-off tube. Not the best choice for an air tight seal- a rubber stopper will give a better seal.
Other Items from Glass Carboys & Accessories 5 Gallon Glass Carboy - 3 Gallon Glass Carboy - 6 Gallon Glass Carboy - Carboy Handle - Rubber 2 Spout Carboy Cap - 3 Piece Plastic Airlock - Plastic Carboy Drainer - Fermometer Stick On Thermometer -