The YELLOW JACKET 41318 Quick Coupler is a versatile tool designed for HVAC and refrigeration systems. With a 4 1/2 inch length and 1/4 inch connect size, this gauge is suitable for charging, testing, vacuuming, and measuring pressure in various refrigerants such as R-134a, R-410a, and R-22. The coupler features a yellow color and includes a red high side hose and a blue low side hose, making it easy to identify and use. With mechanical and digital features, this gauge provides accurate readings for professionals in the HVAC industry. sale includes both high and low side couplers and tank adapter to gauges
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