BRIEF INFORMATION: Model Number: ZSTZ, ZSTX,ZSTB,ZSTBS Connecting thread:R1/2 or R3/4 Packaging & Delivery Packaging Detail:International standard (200PCS/CTN 20CTNS/PLT 20PLT/20'FCL) foam box inside to protect the glass bulb, carton package for reinforcement brass body, chrome plating or White pendent,upright,wallside,universal 1/2"(15mm)3/4"(20mm) fire sprinkler 1.Max. Ambient Temperature:38�°C 2.Sprinkler Rated Temperature:68�°C 3.The diameter of glass bulb: 5mm 4.Rated working pressure:12 Bars(1.2Mpa) 5.Airproof test pressure: 24 Bars(2.4Mpa) 6.Strength test pressure:30Bars(3MPa) 7.Thread: 1/2", 3/4" 8.Flux coefficient: 80, 115