If you're installing any gas appliance - whether it's gas logs, a wall heater, garage heater, or stove - this Mr. Heater hook-up kit has all the pieces you need in one package. No more running to the hardware store three times because you're missing one fitting! The kit includes an 18-inch flexible gas line that's super easy to maneuver into tight spaces, three different couplings to fit most appliances, and this really handy on/off valve that lets you shut things down for maintenance or seasonal use. The steel construction feels solid and durable - not that cheap thin metal that makes you nervous with gas lines. Installation is straightforward if you know what you're doing (always get professional help if you're unsure with gas work!). The valve is particularly smart for summer months when you might not need that garage heater, or for easy servicing without turning off your main gas line. Everything threads together smoothly with no leaks (but always check with soapy water!). Seriously takes the guesswork out of gas appliance installations.