The New 26 mm COMBI Twin with co- as well as counter rotating screws with a gear selector for easy change over. The Scientific 26 mm Combi Co and Counter-rotating Twin Screw Extruders are made with a complete modular build-up of the clam shell barrel, where each barrel section have a length of 4 D or104 mm. The standard twin has a drive power of 15 KW and a max screw PRM of 400 for counter and 800 for Co-rotating. It has a re-designed high torque gear box comprising of additional shaft supporting gears and a direct driven gear pump for closed loop forced oil lubrication and cooling.