Profile: Rolf Koerner is an integrated manufacturer providing extrusion screen packs, wire cloth rolls, and a large range of filter elements to the plastics extrusion filtration industry. Some of our products are metal screens, wire screens, wire mesh, wire cloth, cylinder screens, bound screens, welded screens and woven wire. We also offer filter discs and framed packs at various shapes and dimensions. Framed packs provide better sealing and are typically made from aluminum, copper or stainless steel.