dolitify 10PCS Copper Pipe Extension Joint Connectors, 1/4" And 3/8" Pipe Coupling Adapters with Flare Nuts Flare Fittings for Hvac for Fuel, Natural Gas, Refrigeration, Vacuum Systems

["Fit for Standard AC Pipes:Precision-engineered to match 1/4\" (6.35mm) and 3/8\" (9.53mm) copper tubing, ensuring tight, secure seals for mini-split installations and line extensions.","Brass Construction:Forged from high-grade brass for exceptional rust-resistance, delivering leak-proof performance and long service life in HVAC, refrigeration, and vacuum systems.","No-Weld Quick Installation:Tool-friendly flare nut design lets you connect copper lines in minutes with just a wrench—no soldering, no special skills, saving time on repairs and extensions.","Wide Compatibility:Fit for air conditioning, refrigeration, fuel/gas lines, and vacuum setups; versatile fittings for HVAC techs, contractors, and DIY home repairs.","Complete:Includes 10 adapters (2 of each size) with matching flare nuts, providing a full solution for most HVAC maintenance projects."]