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 R134A R32 R410 R22 pressure reading. Color-coding on gauges, valves and hoses for convenient operating. Comes with a hook, a Joint and 3 hoses (red, blue and yellow). Manifold are 2-way and made of brass. Hoses working pressure:500PSI Burst pressure:2500PSI Working temperature:-20℃ to 60℃ Product function:This product is mainly suitable for the pumping and pressurizing operation of refrigeration maintenance, used for refrigerant filling of air conditioning system, and displays the real-time system pressure. Note: Compatible models are for reference only. Please confirm whether it is suitable when placing an order. Can not Due to different production batches, the label words on the product are random and cannot be specified. The actual product may have slight differences or color differences. This does not affect the applicability. Colour:As Shown Material:Plastic+Metal Package Contents: 1 * Air conditioning and refrigeration tool set Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.