Product specifications: Material: metal Colour: Black Measuring range: 0~-30inHg / 0~-1bar Product size: 5.1 * 4.8cm Weight: 86.4 grams Packing size: 5.5 * 5.5 * 5.5cm Package weight: 97 grams The barometer is a stable gas pressure measuring tool. Mini size for easy carrying.feature:This vacuum gauge is a dual scale dial gauge.The measurement range is 0~-30inHg or 0~-1bar.Wide range of applications - water, oil, air, etc.A metal casing protects the internal fittings.Mini size for easy carrying.