NEVER RUN OUT OF PROPANE - Grill, camp, and heat with ease without the worry of running out of propane. Meter will show when you're running low so you never run out EMERGENCY FLOW CONTROL - Emergency flow control detects gas leaks and restricts flow ensuring your safety and peace of mind GLOW IN THE DARK DIAL - With easy to read glow in the dark dial, your propane meter will display your propane levels, even in the dark ALL APPLIANCES - Made to fit appliances with type 1 connection, gas gauge meter is easy to connect, no tools required WORKS WITH OTHER ADAPTERS - Meter can be used with other adapters like propane regulators and miscellaneous propane adapters This product is a gas cylinder adapter, with a pressure gauge to know the gas volume of the gas cylinder at any time. The external thread is 7/8-14 tooth Unf left thread, and the internal thread is 1 inch-20 tooth fine thread. The thread adopts the thread, which is suitable for gas cylinders. Capacity:80000-150000BTU/hour Working temperature:-40C - and55C Import:25-250PSIG Export:2.5PSIG-20PSIG Colour:Yellow and Black Material:brass Package Contents: 2 x propane gauge Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is 1-3cm.