Eyepieces Huygenian 10X and 15X Screen 150mm diameter Glass Projection Screen is provided, can be rotated over 360-degrees. Body Monocular Fixed Straight Tube, length 160mm. Nosepiece Triple revolving nosepiece with accurate centering and positive click stops Stage Detachable Mechanical stage for X-Y cross movement 50X75mm, fully graduated vernier scale.Illumination 20W halogen lamp, 220/110Volts. Lamp slots provided for natural cooling of the illuminator. Objectives Achromatic 4X – 10X- 40XSL.