So, I got a little tired of waiting for the new tubes to come in. I lost one of my Reactors the other night and am totally bummed. That one had the only good atty left in it. LOL. Oh, well. I had some Boge XL single coil cartos laying around and decided to cut a tube to fit to the tank. It hits like a champ. Still going strong. This is a suggestion to anyone that has some Boges. Its like a wicked looking Cartomator. I am very pleased. This tube is poly propylene .