What is this?

[OdinsRoar]

Can anyone tell me what this is and what its purpose is? It is currently disconnected and the rubber hose coming from it is plugged. was connected to a relay and ground at one point

 

[LJBean]

Air horn pump.

 

[OdinsRoar]

Air horn pump.

View attachment 664262

You know google never works for me when i try to look up items with it thank you for the help!!

 

[LJBean]

Google Lens is amazing - almost scary.

 

[Jamesval035]

Google Lens is amazing - almost scary.

I definitely don’t use it enough.