GasWatch TVL212 Propane Level Indicator and Safety Gauge Propane-level indicator and safety gauge with easy-to-read colored dial For propane tanks up to 40 pounds; easy to connect; no tools required Built-in leak detector; emergency flow limiter in the event of a major leak For use with gas grills, patio heaters, and other outdoor appliances Measures approximately 8-4/5 by 5-3/5 by 4-1/2 inches; 1-year limited warranty