SPS Inserts are flat Z-stages, that can be integrated into most standard XY-stages of microscopes. They provide most precise positioning along the optical axis. SPS Inserts are available with 3 different ranges: 120, 250 and 500 µm. The dimensions are the same for all ranges. The aperture of 128.5 x 86.5 mm can bear the optional sample- and petri-dish-holders.