Name: Fire Sprinkler Norminal Diameter(mm): DN15 or DN20 Thread Standard: NPT/BSPT Material: Brass or Zinc Surface Finish: Chrome/Natural brass/White Temperature Rating: 57/68/79/93/141/182 Celsius Degree Response: Standard/Quick K-factor: 5.6(80)/8.0(115) Working Pressure: 1.2Mpa/175Psi