Accurate focusing is facilitated by the provision of a rotary control.
ended bulb and protective case but without batteries.
A high quality X 30 magnification instrument with built in illumination and a retractable condenser / daylight filter slide.

Biology School Lab Equipment Suppliers in India 

Ltekonline are the manufacturers of Hand Magnifier Biology Magnifiers Lab used to demonstrate engineering principles in Engineering Colleges, Engineering Schools and Biology Laboratory Equipment for Engineering Teaching Lab in Universities