PRO-Fit Quick Connect fittings are designed to connect refrigerant lines without an open flame, brazing, or swaging. They are suitable for joining refrigerant lines in seconds after cutting the line, deburring the ends, and push to connect. Provides leak free connections for refrigerant lines without the need of an open flame, brazing, flaring or swaging. Join refrigeration lines in seconds by simply cutting the lines, deburring the ends, and push to connect. Patented leak-resistant, double O-ring & grip ring seal design for both CFC & HCFC refrigerants. Heavy duty, corrosion & UV resistant brass body with deeper insertion cups for straighter runs. Perfect for mini-split installations. PRO-Fit Quick Connects offer a time-saving, complete installation system covering line set sizes from 1/4" thru 7/8" in multiple configuration options - unions, elbows, reducers, elbow reducers, sockets & service.