1,Microscope observation instument,Sliding Binocular Head, at 45 Rotatable 2,Objective: Achromatic DIN 4X,10X,40X(S),100X T-25 Microscope observation ... 6V/20W ;Plan-concave MirrorThe series of microscope is composed by nine main component parts:1. Stand: It's the base bearing ... total weight of microscope which built in illumination system ...