PyroPak® Preloaded Fireballs create a rising ball of flame with a mushroom cloud of smoke which lasts approx. 3 seconds. The rising fireball is approx. 8' in diameter and 10' high. Recommended vertical clearance is at least 15'. The device is a canister 3 5/8” tall by 2 3/4” diameter. Secure this device well before firing. Shake well before use. Remove the protective cardboard cap before firing. Do not break or otherwise defeat the plastic covering over the top of the device. This covering normally burns away when the effect is fired. This device leaves the outer canister and an inner cardboard disc after fired. Sold with an electric match installed, standard lead length is 36".