Features Pressure Range: The measurable pressure range is large, the measuring range is 0 ~ ‑14psi. Built to Last Construction: The case of our heavy duty pressure gauge is made of stainless steel with wetted parts of brass and copper alloy. The lens is made of polycarbonate, making it hard to break and scratch resistant Accurancy: The pressure gauge has been accurately designed with high measurement accuracy+/-3% Wide Application: Our general purpose boost pressure gauge is suitable for plumbing, heating, air conditioning, pneumatic, hydraulic, water tanks & air compressors. It is especially useful to monitor the pressure in swimming pools & any other water systems, plan & design an irrigation system & more. The pressure changes to drive the pressure value corresponding to the pointer of the elastic component , and the transparent meter cover is easy to read Specification:Item Type: Pressure Gauge Material: 304 stainless steelPurpose: Test vacuum pressure Range: 0 ~ -14psi 0 ~ -1000MPA Outer Diameter: Approx. 63mm / 2.5in Connector: NPT1/8in Package List:1 x Pressure Gauge Package List 1 x Pressure Gauge