Electric Micrometer Inside Probe

A solid carbine ball point is uesd to provide long life.
Gauge head wear is minimized by providing a large clearance between the gage head
  and the work piece.
Even a work piece with a surface roughness of 6 or more can be measured.
PG-8000-A   PG-8000-B
Ø D L   Ø D L
6 to 15 mm 10   6 to 15 mm 4
15 to 50 mm 10   15 to 50 mm 4
50 to 120 mm 15   50 to 120 mm 4