... the most comfortable view position. Advanced Infinity MicroscopeModel: YK-BL158This Advanced Infinity Microscope has anadjustable angle head so ... -point 10X eyepieces 22mmInterpupillary distance adjustment from 55-75mmPlan Infinity objectives: 4X, 10X, 40XR, 100XR OilDouble layer ... .5" x 10" x 18.5" (H)Optional Upgrade (Special Order):12V / 100W illumination20X or 60X PLAN infinity objectivesSix place ...