Mitutoyo 511-752 Bore Gauge and Dial Indicator, Inch, 1.4-2.5" Range, 0.0001" Graduations, +/- 0.0002" Accuracy Bore gauge (511-732) measures 1.4 to 2.5" with 0.0001" graduations and + or - 0.0002" accuracy, for performing close tolerance inside diameter measurements White dial indicator (2923SB-10) with contrasting hand for precise and easily-readable measurements in inches Contact points are carbide-tipped for durability Large, hollow-structured grip to reduce heat from the operator for accurate measurements Comes with six anvils, four spacers, and a protective cover for the dial