10 Pack Niikappu Copper Cap Plug, 1" LF Copper Plumbing Fittings 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.","Safe & Certified - Made from LF copper with NSF-61 certification. Safe for drinking water, featuring a smooth, burr-free finish.","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 - 10 pack 1\" copper cap plugs are included in the copper fittings package.","Tips - Please confirm the thread size carefully before purchasing. Welding required for installation."]