... -400XArticulated Free Trinocular Head, Interpupillary Distance: 55-75mm; 30° Inclined, 360° RotatablePlain Stage With Paired Clips: 120X125mmØ2-Ø30mm Iris Diaphragm ... 3.The microscope head inclined at an ergonomic 30 degrees and rotates 360 degrees for flexible viewing positions 4. Oversize double-layered, graduated ...