... :Brass or Zinic alloy. 3.Size:1/2" 3/4" upright fire sprinkler1. Sprinkler material: Bronze or zinic alloy2. Sprinkler thread ... or 93degree.5. Sealing test pressure:3Mpa6. Type include:Conventional, Upright, Pendent, Sidewall upright, Sidewall horizionalSidewall pendent and so on ...