3/8" COMBINATION BOTTLE FILLER SPRING OR SPRINGLESS (FERMTECH) - Can be used with or without the spring, which makes it both a gravity filler and a spring bottle filler. Guaranteed not to leak. The main body can be unassembled from the acrylic tube for cleaning and is long enough to fit most bottles. Attaches to 5/16" or 3/8" siphon hose.