165*F Fusible Link Brass Pendent Sprinkler,
Reliable Model G, 1/2" NPT, K=5.6
http://i.ebayimg.com/t/165-F-Fusible-Link-Brass-Pendent-Sprinkler-Reliable-Model-G-1-2-NPT-/00/s/MTYwMFgxMDc0/z/BVMAAMXQzr1R4Nsw/$(KGrHqF,!nsFHfLqpijoBR4NswLGow~~60_57.JPG