• Wide range of ID measurements by combining extension rods (pipes) and anvils with the micrometer head.
• Carbide-tipped measuring faces are available. (series 137)
• The 139 and 140 series use highly-durable/ large-diameter extension pipes.
• Series 137 supplid in fitted plastic case except 1550mm/60in come in wooden case.
• Series 139 supplied in fitted wooden case except 500mm/20in come in plastic case.
• Series 140 supplied in fitted wooden case.

The Mitutoyo 137-203 Tubular Inside Micrometer has a range of 50-500mm, head travel of 13mm, and the following extension rods: 13,25,50 (2pcs), 100,200 mm.