1/4" FCM (Female Compression) x 1/4" FCM fittings with washers ; Polyester-reinforced PVC connector with stainless steel couplings for secure connection ; Lead-free ; UPC (Uniform Plumbing Code(R)), NSF 61 & 372 (National Sanitation Foundation) & CSA (Canadian Standards Association) certified ensures product safety ; Durable design protects against bursting & cracking ; 5-year warranty;