Don't let fermentation be a messy business.  Use this tubing for a blowoff instead of risking letting your airlock get clogged with debris.  Its outside diameter perfectly fits inside most standard glass carboy necks without an adapter.

Sold by the foot. Enter your desired length in feet in the quantity box. Clear, flexible, and food-safe, this polyvinyl chloride (PVC) tubing is perfect for handling beverages and liquids.
Inner Diam. 1
Outer Diam. 1¼
Max. Pressure 25 psi (at 70° F)
Max. Temp. 150 °F