The Yellow Jacket 16460 Yellow Jacket PLUS II "CA" Heavy Duty Charging Hose O30321 is a high-pressure, yellow round hose designed for use with Ductmate compatible brands. With a maximum pressure of 800 psi, this heavy-duty charging hose is perfect for HVAC and refrigeration applications. The Yellow Jacket brand is known for its quality and durability, making this hose a reliable choice for various refrigeration systems.