... :Stainless O-ring Crimp-on/compression2.Material :DR brass 3.Technical :Heating,forged,tempering,cutting,wash,packing4.Type :Straight,Elbow,Tee ... ,Stopper,etc.5.Size for :SDR 7.4 Grade PE-X pipe from DN16mm-DN32mm6.Certificate :Watermark,ISO90017.Standard ... . AS Reduce elbow brass fittings for DN16-32mm SDR7.4 Grade PE-X pipe