Kabra Extrusiontechnik Ltd. Offers Single Screw Extruder for Manufacturing Polyolefin Pipes. Kabra Extrusiontechnik Ltd. Has an ISO 9000 certification. Single Screw Extruder for Manufacturing Polyolefin Pipes comes with Barrier Screw having separate channels for melt and solid, resulting into higher output rates with good melt homogeneity, at lower operating temperatures.