Pen-Type Microscopes can be used as borescope due to their small diameter and long tube
The diameter of insertion tube: from 4mm to 20mm
Length of the insertion tube: from 60 mm to 2000 mm 
Most of pen-type microscopes are manual focus at one end; They can be fixed focus too.
​Insertion tube can be rigid or flexible or semi-rigid.
We can customize pen-type microscope borescope to meet your needs. Please contact us for details.