The black tubes in the lower portion of the photo are used to fire 3-inch shells and the boxes in the upper portion are used to fire 4- to 6-inch shells. Steel tubes are inserted into the boxes according to the size of shell the firefighters will be launching. The black tubes, however, will not be used this year as the 300 3-inch shells Craig Fire/Rescue has for this year's show come in special packs, which are buried in the ground and will be fired during the finale.

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