The refrigerant adapter Avaly VA-A14516 is for any alternative refrigerant, works properly with vacuum pumps, manifolds and recovery tanks. Designed and manufactured with the best material to meet the strict standards of the industry, also allows a quick coupling to the service valve avoiding the loss of refrigerant when disconnecting. It is adjustable for either side. This ¼" adapter can be converted to 5/16" SAE (2/2-20 UNF) with a female swivel nut with depressor. Comes in a three piece presentation.