Wires conform to Federal Specifications GGG-W-366b for Grade A Master Gear Wires, and are guaranteed traceable to the National Institute of Standards and Technology.
Diameter Tolerance: plus or minus ten millionths of nominal “standard” diameters listed.
Roundness: 10 millionths per Standard GGG-W-366b for Grade A Master Wires.
Surface Finish: 1 Micro inch, lapped.
Each set of two wires is contained in a screw-top vial, the vial is packaged in a hinged-lid box which is labeled to show pitch, internal or external, and the nominal diameter of the wire (also shown on the Certificate of Accuracy contained in each set box).