Product Features: Upright, Pendant, Side wall & Concealed Bulb Nominal Dia & ResponseStandard Response : 5 mm, Quick Response : 3 mm Thread Size (optional)NPT 12 or R 12 Nominal Orifice Size12? Nominal K-factor5.6 (U.S.) 80 (metric) Max. Working Pressure175 psig 1.2 Mpa (12 bar) Factory Hydrostatic Test100% @ 500 Psig 3.4 Mpa (34 bar) Min. Operating Pressure7 Psig 0.048 Mpa (0.48) Sprinkler Finish (optional)Natural Brass, Stainless Steel, Chrome Plated, White Color Coated