This 1" ID tubing is most often used as blowoff tubing for fermentations with vigorous krausening and yeast activity. It is the perfect size for sticking directly into the neck of a standard glass carboy. The other end can be led into a jar of water or sanitizer for a quick and easy blowoff tube. We recommend a length of 4 or 5 feet for this purpose. Make your life easier and your cleanups less frequent with a length of this tubing!