Prepare your semi to be Ready for the Road Ahead with optimal refrigerant levels, with the Mastercool 60" R-134A 2-Way Aluminum Professional Manifold Gauge. Thanks to its assortment of key components such as nylon barrier hoses, easy-to-grip knobs, and free-floating piston valves, this replacement manifold gauge is the ideal option to maintain the correct pressure level of the AC refrigerant. Fashioned with ergonomic components that connect and disconnect with ease. The air conditioning and heating system in heavy duty trucks has a major impact on drivers’ safety and comfort level. Whether you are looking for A/C compressors, condensers, driers, freon, or blower motors, FleetPride has the part you need to make sure your air conditioning and heating are well maintained. Keep your heavy duty fleet operations working as productively and efficiently as possible by finding the right air conditioning and heating part for you. FleetPride is your First Click in Heavy Duty .