Performance Indicator Gauge

Yes, its holding a vacuum and I put all back together and got the dash installed in the car. I didn't want it to sit while I look for parts.
I'm sure it is some corrosion in it because there was some under the nipple. It's my fault because I left the hose off of the intake three years ago when I changed the cam out.
I think I'll find another one and have that one redone so I can swap them out quick or wait for the winter to repair mine.