The FB212 motorized focus block is compatible with Prior's XY stages for upright reflected light microscopy. 

It has an array of mounting holes for easy installation onto imperial or metric breadboards, as well numerous hole patterns providing compatibility with Prior's H101A, H101N2F and H105/2U stages. 

It is based on Prior's high-performance FB210 linear actuator for 50 mm Z-axis travel and has a high load capacity of 14 kg for use with heavy samples or large stages. 

The FB212, when combined with a Prior stage and controller, provides an extremely reliable XYZ platform for both academic and industrial research into applications such as materials chemistry or semiconductor development. Its simple but high performance design makes it easy to integrate with gantry based optics.