Gas Leak Detector, Low Temp;Leaks Appears As Large Strong Bubbles Which Cling To;The Surface And Are Fluorescent Under A Black Light;Non-Freezing;Non-Toxic;Non-Hazardous;Fluorescent, Yellow-Green;Rated To -30°F (-34°C) To 200 F;Bubble-Type Gas Leak Detector;Used On: Hot And Cold Piping, Natural Gas,Most Gases, Air;And All Refrigerants.;8 Oz. Plastic Bottle W/Dauber.