A linear horizontal stepper positioning stage has been announced by attocube systems AG. With a 28-mm-diameter center hole, it is suitable for optical transmission experiments. It measures 45 × 45 × 11 mm and can be integrated easily into existing microscope setups and other instrumentation where space is limited. The optoelectronic encoder provides ultraprecise closed-loop operation with a sensor resolution of 50 nm and repeatability of 400 nm. Loads of up to 300 g can be moved over a travel range of 7 mm at room temperature and under ambient conditions.