Cast boosters are detonator or detonating cord sensitive, high-density/high-energy molecular explosives that are available in a variety of sizes that are designed to optimize initiation of booster-sensitive explosives. Manufactured with an internal through-tunnel and detonator well for application with either electric, fuse or shock tube detonators. Formulated from primarily PETN, TNT and other high explosive materials. Cast boosters detonate at a velocity of approximately 24,800 fps.