This precision inspection spirit level is made by Kinex Measuring who has been in the business of making quality and accurate measuring tool since 1906. This spirit level is perfect for checking the work of machinists and toolmakers, setting up machinery and any other task requiring extreme level accuracy. The body is milled from a solid piece of tools steel and then lapped for extreme accuracy. Overall size is 8" x 1-5/8" x 1-1/2". Weighs in at 3.8 pounds. The bottom features a longitudinal groove to allow use on round bars and shafts. Accuracy guaranteed to be within 0.02mm per meter or 0.000239" per foot. Comes housed in an anodized aluminum storage tube. Comes with signed inspection certificate.