The YELLOW JACKET 42004 Series 41 Manifold with 3-1/8 inch Gauge is a versatile tool designed for charging and testing purposes in HVAC and refrigeration systems. Featuring a multicolor design and a durable construction, this manifold comes with 2 valves and is capable of handling various refrigerants like R-410a and R-22. With a compact size of 18 inches in length and 12.0 inches in width, this mechanical gauge is ideal for professionals in the business and industrial sector seeking accurate readings and efficient performance.