The GeneralAire 4004 works with the following air filter gages:
The GeneralAire G99-14 Filter Gage Remote Mount Kit is a gage remote mount kit that includes tubing, screws, and detailed installation instructions. The G99-14 works with the G99 air filter gage and allows you to mount the G99 up to 10' away. The included instructions will walk you through the process. This air filter gage extension is made from durable construction material and is a genuine GeneralAire part.
GeneralAire G99-14 Filter Gage Remote Mount Kit specifications: