Often referred to a Boom Gun - this one has more a Bang. The main tube is 2" stainless steel tube. Includes Bernzomatic T4000 torch head and thumbscrew clamp to secure tank. (MAPP gas not included/or shipped - it can be purchased at your local hardware store or major home improvement stores.)
 
SAFETY FIRST!!
ALWAYS Wear hearing and eye protection.
NEVER point at anyone or anything.
Disconnect gas bottle when not in use.
Turn yellow knob on torch head to lock position when not in use.
Insure the gas bottle is properly threaded and tight.

Do not transport with gas bottle installed
Point the open end of the tube in the direction of the retrieval item is being thrown.