When the customer need the higher output capacity and well mixed compounding or master batch granule material, Co-rotating Parallel Twin Screw Extruder will be their good choice and solution. Thus, the gearbox for Co-rotating Twin Screw Extruders plays the essential role in supporting this extruders. SUN LUNG elaborately develop the co-rotating twin screw gearboxes with accurate output haft gap tolerance control, high rigid gears and gear shafts strength to perform the most stable and uniform output material quality.