1/2 inch FTG side fits into fitting, 1/2 inch sweat (C) side fits over copper pipe For use with types K, L, M hard copper pipe Residential, commercial systems: potable water, plumbing, air conditioning, refrigeration Made of high quality lead free copper, certified to NSF/ANSI 61 Annex G, safe for drinking water Each pack contains 100 pcs PROCURU is the brand of choice for plumbing professionals. Manufactured at the ISO approved facilities, each fitting is rigorously tested and engineered for maximum durability and performance.