Sorry I didn't see your post! The cylinder is steel, not sure what make. The regulator has 2 guages, one guage is shot but I never needed/used it anyway. It was for my CA reactor. The needle valve is:
http://www.jlaquatics.com/phpstore/s...ategory_ID=156
I do not have a solinoid or bubble counter, but could make you a bubble counter, or tear the one off my reactor.
Hope that helps