Dual bias calibration standard

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SKU:
112-Dual-Bias
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Top artefact for normal bias calibration, bottom artefact for reverse bias calibration. Optimised radius uncertainty. Includes a 4 mm ball for stylus tip to tip calibration. Options available: 1. 12.5 mm Radius (0.49 in) 2. 22 mm Radius (0.87 in) 3. 49 mm Radius (1.93 in)