Superior Airflow Detection Candles. 8000 cu ft in 60 seconds. 12-Pack. Designed for Use with Superior 5E Blower for Locating Leaks and Odor Sources in DWV Drain Systems and Sewer Lines. Made in USA. FIND SOURCES OF SEWER GAS SMELL: Inject into wastewater lines, sewer systems, septic systems and grease drains to find the sources of sewer gas odors quickly and easily. Use the Superior 5E Blower available on Amazon. Search: Superior 5E Smoke Blower. LET’S YOU “SEE” AIR MOVEMENT: Blends readily with air and gases to show air flow, turbulence, speed and direction. Simplifies the observation of flow patterns in all types of wind tunnels, air-moving equipment, and natural airflow, indoors or out. Balance HVAC systems by observing the discharge of from ducts and supply grilles. FIND LEAKS FAST: Find leaks in drains systems, sewer lines, boilers, heat exchangers, semi-trailers—any enclosed space by watching where leakage happens. Invisible leaks become readily detectable. To detect leaks in small- or medium- sized enclosures--such as furnaces, tanks, piping systems and duct work. GREAT PHOTOGRAPHY EFFECTS: Photographs from white to dark gray, depending on density and lighting. Dramatic color effects can be achieved with colored lights. Many uses for movie and film-making special effects, FX. IN THE BOX: One pack of 12 Superior Candles. Each produces about 8,000 cu ft in 60 seconds. May set off smoke detectors. Not for use around flammable gases. Low odor, no residue. Made in USA. Your satisfaction guaranteed.