We are offering school microscope.Observation head : mechanical tube length 160mm, fitted with an inclined observation tube for comfortable & convenient observation. nosepiece : nosepiece triple revolving nosepiece with positive centring & click stops. stage : fixed square stage size 100 x 100mm with stage clips. illumination : plano-concave mirror diameter 38mm mounted on gimble mount. objectives : achromatic 4x - 10x- 40xsl. eyepieces : huygenian 10x and 15x.