Different Kinds of Mortar Tubes There are many different types of mortar tubes that are used to shoot off fireworks. Hdpe, steel, fiberglass, and cardboard are some that are most commonly used. Each of them is very different from each other, and they each have different uses. When firing aerial shells, you want to be very careful. Don’t stick anything over the tube when you are reloading another shell or lighting one. When you have shot one shell, let the tube cool off, an
