1.pipe fitting FM/UL approved 2.Materail: ductile iron 3.Groove as Victaulic standard 4.EPDM gaskt 5.DN15- ... , DIN, JIS, GB, BS, etc.TypeManufacturerSize1/2"-12",DN15-DN500MaterialDuctile iron,ash ironFinishPaint, Epoxy or Galvanization ApprovalFM/ULUsage1) Automatic sprinkler system ...