... diameter 2.Inlet flange,ball joint and bags are optional screw conveyor :1.168,219,273,323,407mm in diameter 2 ... joint and bags are optional 3.long lifescrew conveyor :cAdvantagesA) High quality motor and gear box, with heavy duty design, large torqe ... .B) Standard fitting parts, middle bearing, end bearing, splined shaft coupling,so easy to install,C) Simple structure,low cost,strong ...