... etc. 3.Quality assurance;Watermark,ISO9001 Specifications1.Connection Method:Stainless O-ring Crimp-on/compression2.Material :DR brass 3.Technical :Heating ... ,tempering,cutting,wash,packing4.Type :Straight,Elbow,Tee,Stopper,etc.5.Size for :SDR 7.4 Grade PE-X pipe from DN16mm ... MAXMIN MAXDN1616.0 16.3 2.2 2.5DN2020.0 20.3 2.8 3.1DN2525.0 25.3 3.5 3.8Connection method Packing ...