48-piece Economy Microscope Set. With the GeoVision MicroPro, young scientists can investigate everything from cells to crystals! Perfect for classroom use, the die-cast metal body, glass eyepieces, and power settings from 50x to 600x provide users with superior precision viewing. The built-in light and rack and pinion focusing help deliver bright, clear images. The 48-piece kit has professionally prepared slides and everything users need to make their own specimen slides.