Size: 5/8 RECTORSEAL 87039 PRO-FIT 5/8" QUICK CONNECT SOCKET 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. FEATURES Quick and easy push-in Flame-free: no flaring or brazing needed Single use with quick release removal Robust brass body Leak-resistant double O-rings sealing Compatible with major refrigerants High tensile strength Vibration and impact resistant UV resistant Corrosion resistant Sight window for connection verification APPLICATION Flame-free fittings for connecting refrigerant lines For HVAC/R up to 870 psi (60 bar) Prevent refrigerant lineset leaks RECOMMENDED FOR Residential use Copper & aluminum linesets Mini-split HVAC units Unitary indoor coils.