fire hydrant cap/plug with chain,good durability Fire Hydrant Cap/plug with chain: 1) Style:Storz;2) Material: Aluminum;3) processing: sand cast;4) tool: CNC machine5) Size available:1'',1.5'',1.75'',2'',2.5'',3'',4''/Connector,5'',6''.Fire hydrant cap with chain provide enhanced security for fire hydrants. A fire hydrant cap of the assembly has an interior threaded cap portion which attaches to ...