Fire hose coupling(storz coupling, Aluminum coupling) 1)Material: brass, Aluminum 2)Work pressure:16Bar 3)Size:DN25-DN100 Fire hose coupling(storz coupling, Aluminum coupling)1)Size: 1"(DN25 ... )- 4"(DN100)2)Material: brass, Aluminum3)Work pressure:16Bar4)Coupling style: female thread,male thread,hose coupling,coupling ...