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The H. Weidmann AG has set up a unique injection-moulding tool for replication of optical and nonoptical microstructures down to a sub-?m scale. Our approach simplifies the initial tooling and, thus, substantially lowers the cost threshold for feasibility studies and testing of injection-moulded microstructures. Two case studies, with micro-pipettes and a micro-spectrometer, respectively, show the usefulness of this new process technology. The service for polymer-sample prototyping is available on a commercial basis at reasonable costs and turn-around times.