Digital Radius Gauge Range 0.2 in to 35.83 in / 5 mm to 910 mm (External) 0.3 in to 35.83 in / 7 mm to 910 mm (Internal) Accuracy +/-0.001 in Configuration Concave and Convex Radii Maximum Measurement - Inch 35 13/16 in Minimum Measurement - Inch 0.2 in (External) 0.3 in (Internal) Number of Pieces 2 Operation Type Digital Finish Uncoated Includes Case