VDO Mini Pressure Gauges are designed for direct-mount monitoring of fuel and oil pressure systems. They feature a 1 1/2″ outside diameter and 1/8″–27 NPT connection. These mechanical pressure gauges are made with precision-machined brass movements, built-in restrictors, and steel housings to deliver exceptional accuracy and durability. They are compatible with all fuel management systems from carburetion to fuel injection. The 100 psi gauge can be used for direct-mount oil pressure readings. Chrome pressure gauges feature black numbers on white dial, black pointer, and chrome bezel/housing. Black pressure gauges feature white numbers on black dial, red pointer, and black bezel/housing. Silver pressure gauges feature black numbers on silver dial with black pointer and chrome bezel/housing.