... for twin compounding extruder. dia25-133mm,Kinds of single key, head Spline, Hexagon, Involute Spline ect. Segment barrel for the ... twin compounding extruder. Φ25-Φ133mmKinds of single key, head Spline, Hexagon, Involute Spline ect.,The building block screw consists ... life of screw. Easy wearing parts of barrel feed inlet made from imported anti-wear alloy can be improvde abrasion performance.