Full of certifications, can be fixed without stopping water supply, two seal rings to prevent water seepage dn20-32mm used as ppr pipe fitting, material is HDPE, easy to operate, loose joint, good sealing.specification: Size weight (g/pc)25x1/2 58.2025x3/4 58.0032x3/4 87.2032x1 90.50 male thread pipe fitting