Mitutoyo 137-213 Extension Rod Tubular Inside Micrometer, 2-20" Range, .001" Graduation Transmitter Main body is offset for

Main body is offset for marking from an edge reference

With generic case

Lightweight ABS gage shroud for extra strength and protection

Accuracy:  0

Mitutoyo 137-213 Extension Rod Tubular Inside Micrometer, 2-20" Range, .001" Graduation Transmitter Main body is offset forItem Description Range: 0 1" Graduation: . 001" Range: 2 20 Travel of micrometer head: . 5 Accuracy: + {. 00015+. 00005n+. 00005R 2}* R=Maximum measuring length (inch) n=Number of rods Fraction rounded up Extension rods: . 5, 1, 2, (2 pcs.), 4, and 8 Wide range of ID measurements by combining extension rods and anvils with the micrometer head With fitted plastic case