Product OverviewRises to a height of up to 500′ and burns for up to seven seconds at 16,000 candela.Using aerial signals:Aerial flares should be fired after sighting or hearing a potential rescue vessel. To attract attention to your distress situation, the U.S. Coast Guard recommends that you fire two aerial flares–one immediately after the other–so rescuers can confirm the sighting and the direction of the signal.These flares replace all previous Orion 12-gauge signals with improved performance. They will fit any 12-gauge launcher manufactured since 1981. Four-pack.Signal Type:12-gauge aerial flareLight Output:16,000 candelaBurn Time:Up to seven secondsAverage Altitude:Up to 500’Deployment Method:12-gauge launcherType Approval:USCG Day/NightReplacement Interval:42 months from manufacture dateHow Sold:Four packWARNING: Cancer and Reproductive Harm -www.P65Warnings.ca.gov