It is for LDPE film blowing machines and you canchoose diameter from 45mm to 120mm and L/D is from 28 to 32. Whatelse, we can supply with gear box together. Batten is aprofessional supplier of Screw & Barrel for Plastic Machinesand Drip Irrigation production lines in zhoushan city since 2008!In our factory, there are about 60 workers, 3 technical engineers,2 managers and we have exported twin and single screw and barrel toMiddle East(Iran, Turkey etc), Russia, Malaysia.