A mechanical oil pressure gauge from Stack which is ideal for vehicles with no or low powered electrical systems. If a back light is not required then the gauge can be operated with no electrical connection at all, however the gauge is supplied with a white LED back light and illuminated needle which require a 12 volt feed.No electrical feed required (unless illumination is required)52mm Gauge diameterWhite back light with illuminated needle for night time visibilityEasy to read and accurate 270° needle scaleSupplied with a nylon tube and fittings to connect the gauge to the engine. Bar scale gauges are supplied with metric M10x1 male fittings, PSI scale gauges are supplied with imperial 1/8NPT male fitting. A range of thread adapters are available to purchase separately.