... containers,boxes,films,felts,filters,screens,bottles,gravels,stones,sand,metal parts,steel plates,machines,etc.Spraying:Photo-etchants, ... protection,heat protection,dust suppression,etc.Metal makeCeramic orifice insertedStructure3-piece structure of metal make; Comprises three parts: spray ... 303); Optional material:S316 or othersSpray orifice:Ceramics;Metal Parts:B(Brass) or S303(Stainless steel 303); ...