This new article Optic Light 100-90 Borescope 15X has been derived from the Peak “2001 Long Pocket Microscope 15X”.
   It’s a lighting pen that allows to see at 90° the internal walls of tubes till 100mm of depth with a minimum diameter of 15mm.
   This borescope is useful to see the residual of burrs and chips, threads, seal seats, ecc.
   A light source allows a perfect lighting; the power supply is coming from a lithium battery, USB rechargeable.