Specification: Condition: 100% Brand New Material: Metal Color: Shown As Pictures Pneumatic Test Range: 0.3-6.0bar Maximum Test Diameter|: 65mm/2.6inch Maximum Test Height: 72mm/2.8inch External Air Pressure Connection: 6N Cylinder Maximum Pressure: 10 bar Cylinder Outer Diameter: 80mm/3.2inch Cylinder Inner Diameter: 65mm/2.6inch Cylinder Height: 138mm/5.4inch Size: Approx. 24 * 14 * 27cm/9.5 * 5.5 * 10.6inch Weight: Approx. 3800g Package List: 1 * Watch Waterproof Tester Principle: Pressurization to the sealed box can simulate the state of the product dozens of meters underwater. Pressure difference between the inside and outside of the product will be generated after the pressure relief of the sealed box. Air bubbles can be visually seen in the leaking product.