Upright /pendant sprinkler Sprinkler head Fire system Product details 1 material: brass and chrome plating 2 temperature: 68with 5mm glass bulb 3 thread: 1/2" 4 k= 80 5 rated working pressure: 12 bars(1.2mpa) 6 airproof test pressure: 24bars (2.4mpa) 7 strength test pressure: 30bars (3mpa) 8 weight: 53g more or less