1/4" and 3/8" 1/4"and 1/2' Copper Pipe Extension Joint Connectors, AC Pipe Connectors with HVAC Flare Nuts, .No welding required copper flare fittings (1/4"and 3/8")

["100% pure Copper - Our copper fittings are carefully crafted from high-quality pure copper to ensure unparalleled durability, corrosion and rust resistance, lasting reliability.","Used to connect two copper pipes, no welding to reduce fire risk, no special welding machine. The connection can be tightened with a wrench and is durable","1/4\"and 3/8\" combined a set 1/4 and 1/2 two pieces combined a set"]