This product has been discontinued by the manufacturer. Please contact us for the closest replacement - CX23LEDRFS1-1-3 MICROSCOPE SET Upright microscope set for transmitted light observation. CX23 microscope frame with integrated LED illumination, quadruple nosepiece, fixed mechanical stage (120 x 132 mm, travelling range 76 x 30 mm) with right hand low drive control and specimen holder for one slide. Built-in Abbe condenser with NA 1.25 and aperture stop.