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[Gauge Tool] Pointer type dual scale pressure gauge without battery required. The pressure gauge is a dial gauge with dual scales for measuring bar/psi. [Transparent Design] Transparent dial cover and clear numeral readings, convenient for clear and accurate readings. [High Quality] Metal outer case for better protection of the internal components, corrosion resistance and high temperature resistance. [Good Tightness] Good air tightness guarantee the accurate pressure measurement, 1/8inch BSPT thread bottom mount connection. [Widely Compatible] Suitable for measuring the pressure of water, gas, oil and voltage that will not obstruct the pressure system or attack copper alloy parts.