Product Description 209-790 Mitutoyo Dial Caliper Gage - External Type: 0-.500" The Mitutoyo209-790External Dial Caliper Gage has the following specifications: Range: 0-.500" Graduation: .005" Accuracy: +/- .005" Max. Measuring Depth L: 1.38" Length Hb: -- Length Hf: -- Measuring Contact Type: PR Size: 2mm Mass: 40g Features: Versatile OD measuring gages for groove thickness, tube thickness, and hard-to-reach dimensions. Types of Contacts Upper/Lower: S: R 0.4 / R 0.4 K/K: 2mm Ball /2mm Ball or 1mm Ball / 1mm Ball R/S: R 0.4 / 1.5mm Diameter Carbide Ball RK/K: 1.5mm Ball / 1.5mm Ball S/R: R 0.75 / 2mm Ball R: 2mm / 2.5mm Ball T: 6mm Disc PR: 2mm Diameter / R 0.5 PK: 2mm Diameter / Chisel R 0.5