Great vapor production!
I put these on a volcano inferno battery along with their tube tank. As soon as I went to assemble I realized my mistake in that these were too short for my tank. Thankfully I have two separate tanks and managed to mod one so that it was short enough (I ordered two boxes so I'm determined to use them). Worked like a charm and it's putting out nice clouds of warm vapor with a good throat hit. I will definitely be ordering again in both this and the XL size to accommodate both of my tanks.
Reviewed by: Jennifer Amundson from California on 8/26/2013