PACK OF 2 Yellow Jacket 19180 A2L Adapter ¼” LH FFL TO ¼” RH MFL, 45° The A2L refrigerants, R-32 and R-454B, have adopted left-handed connections for their tanks. These new refrigerants are categorized as slightly flammable, so left-handed connections were implemented to differentiate them from A1, non-flammable refrigerants. As the industry adopts these new refrigerants, YELLOW JACKET A2L Tank Adapters and Charging Hoses incorporate left-handed connections so a service technician can safely charge A2L refrigerant systems. A2L Adapters – Features & Benefits Conversion adapters from ¼” Female SAE flare left-handed (LH) x ¼” Male flare for A2L applications Easily identified by double ring on tightening knurl for LH connection Patented CH14 “adjust-a-valve” opener in all 1/4″ female ends Works with or without Schrader core 45° configuration Made in the USA