While this item can be used independently, this gauge is designed as a replacement gauge spec'd to fit Firestone's Single Path Control Panels (2.03" diameter), whether they are pneumatic or electric. This replacement is meant for both the metal & plastic control panels.
This item replaces the gauge for the following part numbers: 2225, 2229, 2570, 2572 Long Part #: WR1-760-9181
