Can you tell me what this was, how important is it , and do I need a new 1?

[dhughins]

I am changing intake manifolds and I went to remove hose from this and it broke. Not the hose. Some people say it's a vacuum modulator but I don't find anything like that by doing searches. The line that comes off the top goes to the transmission I believe. The tranny is a th400.

You don't even have to tell me what it is or how important as long as you tell me how to get another 1.