Dutch United Instruments (DUI) provides NMF surface metrology tools for different sizes of optics. Based on the proven NANOMEFOS technology by TNO, DUI has developed the NMF platform that is the blueprint for all the NMF products which DUI offers. The NMF platform is specifically designed to provide easy, fast and accurate surface form metrology of complex optics to the workshop floor. NMF is non-contact and capable of measuring optics ranging from convex to concave and from flat to freeform, with a typical measurement uncertainty below 15 nm RMS. Currently DUI provide products of difference sizes: NMF1000 S, NMF800 S, NMF600 S and NMF350 S, with the number indicating the largest diameter in mm it can measure.