Thanks for the info. Dumb me, I did find the titles to the cylinders embossed on the ends of the cylinder. The numbers for the cases are there also. I was confused at first, but finally realize that it was because some of the cylinders were in the wrong containers therefore the numbers did not match. Easy solution, just find the right container for the right cylinder. Lots to learn. I have seen several different types of horn cranes. Do you know which one would be the correct one for my machine?