or
Polarization Microscope^ Polarization microscope with Trinocular head Siedentopf 30 degree inclined, widefield eyepieces 10X/20mm, IntermediateTube with Rotatable Analyzer and Bertrand Lens, Reversed nosepiece, CCIS Plan Strain-free Objectives:4X, 10X, 40X(S), 60X(S), BA310POL (Light Split 20/80)