A great product for refrigerant testing, easy to operate and convenient for carrying, can be used on all car A/C, commercial and domestic A/C and refrigeration systems.Features: This is a great tool set for refrigerant testing, charging and evacuation. Can be used on all car A/C, commercial and domestic A/C and refrigeration systems. Gauges are marked for R12, R22, R404A and R134A pressure reading. Color-coding on gauges, valves and hoses for convenient operating. Comes with a hook and 3 hoses (red, blue and yellow). Manifold are 2-way and made of brass.Specifications: The diameter of meter: 7cm / 2.8 in Hose length: 80cm / 36 in Hoses working pressure: 500PSI Burst pressure: 2500PSI Working temperature: -20 to 60 Package size: 23 * 17.5 * 9.5cm / 9.1 * 6.9 * 3.7in Package weight: 1015g / 2.2lb