MAHR 6820426 Superfine Roughness Standard without Cal Cert. Brand: Mahr ID#: 6820426-MHR |MFGID: 6820426 Your Price: $3,869.75 Quantity discounts available QuantityPrice Return Policy Qty -+ Add to Cart Request Info Questions?CallCall Us864.433.9771|Mon-Fri 8-5 EST Share Print Product Info Product Information Description Mahr 6820426 Superfine Roughness Standard Without Cal Cert.