This 3-foot (0.9m) neoprene tubing hose connects laboratory burners to fuel sources such as liquid propane, butane, or natural gas. It is designed to fit gas inlet connectors with a diameter of 8-10mm, with an inner diameter of approximately 7mm and outer diameter of approximately 12mm at the tube ends. The longer length makes this hose suitable for spread-out laboratory setups. The flexible, resilient neoprene construction works with Bunsen, Tirrill, Meker, and other laboratory burners. The hose should always be used in a lab setting connected to a gas jet and never connected directly to a fuel source. Inspect before each use to ensure there are no holes or cracks.