Descriptions: This vacuum manometer is a dial instrument with double scale. The interface is on the back of the pressure gauge. Its measurement range is 0~-30inHg or 0~-1bar , Broad applications - water, oil, air and more, is a great air pressure measuring tool with stable performance. With mini size, it is convenient to carry. Features: This vacuum manometer is a dial instrument with double scale. The interface is on the back of the pressure gauge. Its measurement range is 0~-30inHg or 0~-1bar Broad applications - water, oil, air and more. Metal outer case, well protect the inner accessories. Mini size, convenient to carry. This air pressure gauge is a great air pressure measuring tool with stable performance. Specifications: Material: Metal Color: Black Measurement Range: 0~-30inHg / 0~-1bar Thread specification: BSPT Connection: 1/4" BSPT Thread Appearance diameter: 50mm Size: as the picture Weight: 89g Package Included: 1 x Vacuum Manometer .