Mitutoyo 178-602 Roughness Speciman with Ra mean and 5 Ra uniformity values. This product will be calibrated by our ISO 17025 accredited calibration laboratory prior to shipping to you. A one year calibration will be performed at the time of purchase and shipment. You will receive an accredited calibration certificate with as-found/as-left data and uncertainties. We offer calibrated products and calibration services for many types of instruments. Please see our store for more options.