The Twin-Tube Maggylamp, model ML 204, was designed to give magnification above a white light box. This unit is essentially a simple microscope with individually switched lighting. Focal length is adjustable by the user, with the optimum focal length being 250mm. The ML204 is supplied complete with light box base, magnifying head, support pole and 1.8 metre lead. The ML 204 is ideal for classifying/viewing blood cultures.extension 25.4cm. Finishes: ivory shade and chrome arms. Fixings: Table base or hand held.