Flame King 231786 Propane Gas Level Indicator Check Gauge Meter Propane Tank Level indicator with low and refill calibrations Built in leak detector to restrict flow in case of hose or grille malfunction Easy screw on with large thread grip, Fits all tanks, INCLUDES Travel Cap per DOT regulations Measures approximately 8-4/5 by 5-3/5 by 4-1/2 Inch; 1-year limited warranty UL Approved, ANSI Z21.18, CSA 6.25 Approved