Getting ready for our first camping trip tomorrow, thought maybe we should ID these items to figure out if we need them or not! these two items were together in a baggie, both appear to be brand new... I'm guessing maybe not camper related? I figured out that the object on the left is a pressure regulator, it says "preset 40 50 PSI" on the side... do the plastic pieces go with it? (they were in the same bag together) and lastly: no idea what so ever.... Thanks!!