Thorium Carboy Cap 3, 5 & 6 Gallon, Blow Off Hood with Caps, Orange Silicone with Breathable Thermometer Spouts, 4 Pack Size Carboy Cap Fits 3, 5, and 6 Gallon Carboys Rubber style with two attachments for vinyl blow off hoses Tight fit around the Carboy Mouth Outlet Two spouts allow for easy attachment or inserting of tubes, airlocks or siphons Convenient Four Pack size