This is a 37mm Mil-Spec. Multi-Projectile White Smoke Grenade. These 37mm smoke grenades are manufactured by ALS Technologies, and are currently being used by our military in Iraq. These 37mm smoke grenades can be fired from any 37mm launcher. The ALS multi-smoke grenade launches three pyrotechnic sub-munitions that release a white smoke agent. The multiple sub-munitions provide a wide area of coverage for training, smoke screening and other applications. The sub-munitions are launched up to 90 yards and release smoke for approximately 30 seconds each. These 37mm grenades are the real deal, they are manufactured to U.S Mil-spec. using an all metal casing. These Grenades are used for training and screening purposes and are also very effective in creating a diversion for certain tactical operations. All smoke grenades will be shipped in ammo cans.