Haitian Injection Machine Parts: screw and barrel If you need to order screw and barrel for Haitian Plastic Injection Machine, we need to know: Machine modelï¼? such as MA900, HTF160X. Screw diameterï¼?Such as 36mm, 90mm. Serial Number? Such as , s/n : 200807009020485. Plastic Material? Such as PP, PA+30% GF