Mortar Tubes

[Forti1bs]

Does anyone know anything about the different types of HDPE mortar tubes?

What is the difference between "DR-11 or DR-9" Mortars I know that most tubes are either 12 or 15 inches tall and the typical consumer diameter is 1.91, but I don't know what the DR is all about?

[Pyro Nation]

Hi Forto1bs. Welcome to the forum. You will see this is discussed in another thread. Here is the link: http://www.pyrotalk.com/bulletin/showthread.php?199-Dr-9

[Forti1bs]

Thanks so much. The forum is great.