The YELLOW JACKET 42036 2-Valve Charging Manifold Gauge & Hose Set is a comprehensive tool kit designed for charging and testing refrigerants such as R-454B, R-410A, and R-32. The set includes a blue low side hose, red high side hose, and yellow service hose. The 2-valve charging manifold gauge features a mechanical design with liquid fill, making it a reliable choice for HVAC and refrigeration professionals. With a limited lifetime warranty from the trusted brand YELLOW JACKET, this gauge and hose set is a valuable addition to any business or industrial setting.