Our favorite pen flare, Tru-Flare, seems to be extremely hard to find, and it’s possible the company is out of business (their website has been down for some time).
If you cannot find another pen-style aerial flare to satisfy the required gear list, we are going to permit the substitution of an aerial marine or other style flare system as long it will achieve an altitude of at least 200 feet and have a burn time of at least 4 seconds.