Harpenden Caliper Calibration Block The Caliper 10mm Calibrator Block for testing ensures that your body fat tongs are calibrated and your readings are accurate. The reading screen has 2 needles, one large, one small. Each full rotation of the large needle represents 2 cm (20mm), indicated by the small needle. For example, if you do one full rotation and then it reaches 5, it would be 25mm. For US customers, please note that prices exclude the extra 10% customs tariff that has been imposed by the US Government. We ship internationally using DHL and they will contact you to pay the additional tariff charge.
