R134A R410A R22 R12 Refrigerant Charging Hose Set with Ball Valve Color Coded for HVAC AC Maintenance Features： 1、Versatile Compatibility: This adapter kit is suitable for R134A, R410A, R22, and R12 refrigerants. With its widespread application, it provides convenience in different operation scenarios. 2、Color Coded: The red, blue, and yellow hoses represent high pressure, low pressure, and charging hoses respectively, enabling quick and accurate connections. 3、User Friendly Ball Valve: The hoses are equipped with ball valves, which allow more accurate control of the refrigerant flow, reducing waste and enhancing the efficiency of AC maintenance tasks. 4、Brass Construction Charging Hoses: These hoses with 1/2in inlet diameter are ideal for HVAC car air condition maintenance and coolant adding. 5、 Material: These hoses are made from material, ensuring high resistance against pressure and wear. The thickened design effectively reduces refrigerant loss. Specification： Item Type: Refrigerant Charging Hose Set Material: Brass Inner Diameter: 1/2\in Fitment: Fits for HVAC car air condition maintenance and coolant or for?Freon adding Package List： 3 x?Refrigerant Hose