Fire sprinkler 1.ISO and CCCF certified 2.1/2' ,3/4" 3.brass, chrome plating 4.quick delivery fire sprinkler feature Maximum Service Pressure:175 psig/1.2Mpa(12 bar) Glass Bulb Color: orange,red,yellow,green Response: Standard or Quick Nozzle Temperature RatingMaximum ambient TemperatureColor liquid-filled glass ball5738°corange6838°cred7938°cyellow9338°cgreen14138°cblue