... output conical twin screw and barrel for plastic extruder Ruian Yumin machine screw co.,ltd is a factory specialized in making screw barrel, filter, mould, gearbox ... /90, 45/100, 50/105, 55/110, 60/125, 80/143, 80/156, 92/188, 95/188Material: 38CrMoAlA high quality alloy steelTechnology ...