foam fire sprinkler, sprinkler,fire fighting sprinklers Materail :brass or chorme finished Thread size:1/2'' 3/4'' foam fire sprinkler, sprinkler,fire fighting sprinklers Specifications DescriptionISO,CCC certificateMaterail :brass or chorme finishedThread size:1/2'' 3/4''Reated working pressure:0.4MpaWorking pressure range:0.3-0.6Mpa