Always be aware of when your propane cylinder is running low with the Mr. Heater Propane Gas Gauge. It has an easy in-line connection and meets Type 1 safety standards so you can ensure your safety. It is compatible with propane tanks from 5 to 40 pounds. DESIGN Propane gas gauge Easy in-line connection Meets Type 1 safety standards Fits propane tanks from 5 - 40 lbs. Appliance end fitting with acme nut x acme thread and female P.O.L. Weight: 0.75 lbs. Additional Details 1-Year Limited Manufacturer's Warranty Style: F276342Z