(Pack of 50) Niikappu 1/2" C X 1/2" C Copper Coupling with Stop, Copper Coupling with Sweat Solder Connection for Residential,Commercial

["Wide Compatibility - Fits Type M, L, and K copper tubing. Ideal for residential, commercial, plumbing, HVAC, refrigeration, and medical gas systems.","Certified Safe for Drinking Water - Constructed from lead-free (LF) copper and NSF-61 certified. Smooth, burr-free interior ensures clean water flow.","Durability and sealing stability - The copper plumbing fittings joint allows for precise, leak-free soldering connections, ensuring long-term reliability and sealing of your plumbing system.","Package List - 50 pack 1/2\" C X 1/2\" C copper pipe pressure fittings are included in the copper fittings package.","Tips - Please confirm the thread size carefully before purchasing. Welding required for installation."]