Wow do I love this system! This kit seems to have superseded older part numbers and it was a bit confusing as to whether this is what I needed. It worked perfectly with the A size resin and hardner (there's an extra pump). The kit comes with a set of tubes that you swap out according to the directions. Once installed, I'm under the impression that there's no need to clean out the pumps and close the cans, from what I've read about other woodworkers' experience. Sweet!