J-300 inverted metallurgical microscope ,imaging clearly, wide field of vision J-300,The whole ... ,10X ,40X ,100X(oil)5)Changer: quadripuntal6)Working stage:Double layer mechanical move stage,(Size:130x130mm,Movingrange:50x30mm)7)Focus system:Coaxial ... /20W,brightness adjustable10)Power:transformer,220V J-300 Inverted metallurgical microscope