Mitutoyo 137-213 Tubular Inside Micrometers 2-20″ , Extension Rod Type. Wide range of ID measurements by combining extension pipes and anvils with micrometer heads. Suppled in a fitted plastic case.
? 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″, 8″
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