D9344 Pin Gage Minus Cylindrical Material Black Oxide Coated 52100 Tool Steel Nominal Size 0.989 In. Grade Class ZZ Measuring Range 0.989 In. Accuracy +0.0000/-0.0002 In. Tolerance Class ZZ (0.0002 In) Length 2 In In. Width 0.989 In. Includes Certificate of Accuracy with NIST traceability