Strange Carb part

Hello. I recently rebuilt my 34 pict 3 carb for my '72 beetle. When I took the carb off the manifold, there was something rattling around in my float bowl. It turned out to be a stainless steel ball (Like on the screws on the right side of the carb, but a little bigger) and a little brass cup like object that is threaded on one end. I have never seen this part before. I took a picture but it is pretty blurry. I would take another picture, but I have lost the little ball. (Dog sneazed...) Anybody know where these go?