Jealous Devil Boom! Firestarter's patent-pending shape and formula ensure maximum performance. Boom! Is waterproof, burns for over 20 min with max temps above 1000 deg and emits a 12 in high-flame making it one of the most powerful firestarters on the market. All boom, no bust. Clean and odorless burn. Safe for both indoor and outdoor use. No black or acrid smoke or strong odors typical of most other firestarters on the market. A single boom is equivalent to 4 to 6 traditional starters. Never use multiple firestarters again. No matter if its lump charcoal, wet firewood or jealous devils onyx binchotan, a single boom is all you need to get rolling. Shaped like a bomb because that's awesome. Every bbq is bomb with boom!.