That silver piece on top (and black on the first one) is all one piece, then you have the cup, and the pump. All 3 pieces can be replaced individually if you have a problem, which is cool, but no one ever has a problem haha. I have seen some come from the factory with a small cut in the sealing ring, but it has been a few years ago. Still, I open every single one and check them for suction before they go out the door.
10-4 I was just thinking from a machinist point of view, that if that small ring was separate you could machine it and the extension out of one piece..always thinking
They look great.