ZENA s.r.o. was incorporated in 1991 as a research and development company and has been supplying hollow fiber membranes related products since the very beginning. A commercial membrane application requires not just membranes but a module. ZENA delivers modules in various sizes however, special modules with prescribed foot prints, geometric dimensions, and filtration / contactor surfaces are offered. Ad hoc deliveries of specific modules according technical drawings supplied by a customer are also possible. Different fiber diameters and pore sizes (ultrafiltration, microfiltration) can be produced. Basic membrane module production is very modular and can be customized to various MBR and waste water needs. Small modules, housed or immersed are made to order. Luer lock port connection for lab and biotech usage and single fibers for sensor applications.