Item Detail Table of Content Air Conditioning & Cooling System Service Equipment A/C Refrigerant/Recovery/Recycle/Recharge A/C General Service Service Port Adapter for R-134a, High Side, (Red) Item Number: ROB18191A Price: $59.40* * log in for dealer pricing. Direct from 3rd Party Supplier Add To Cart Description Field service couplers connect to our Enviro-Guard hoses to allow access to service ports on R-134a A/C systems. The quick connect design has an integral safety sleeve which protects against injury and refrigerant loss if the coupler is disconnected under pressure. Warranty One year.