1 x Red high pressure R1234YF quick coupler. 1 x Blue low pressure R1234YF quick coupler. Wide Compatibility:The high/low side pressure r1234yf convertion kit can be not only directly used with r134a quick couplers for converting r1234yf to r134a, but also used with 3 way r1234yf/r134a ac manifold gauge set.
