1)ductile iron grooved Fitting 2)FM&UL&CE&LPCB&VDS&ISO ... ISO2)ANSI, ASTM,DIN,BS Usage:1)Automatic sprinkler system for fire protection on commercial ,civil and municipal constructions ... mine, oil field,textile,powder plant,etc.3)Pipeline system on subway station ,railway station ,airport, seaport,bridge ... )with plastic film,30boxes per pallet at most.2)National boxes,non-wood pallets(1CBM)with plastic ...