The 12587 Series are the same items found in our "calibration" Invar kits, and are manufactured to a tighter length tolerance specification (±0.0001" or ±0.003 mm). In addition, the 12587 Series bars come with a NIST traceable certification specifying their exact length, to the closest 0.0001" or 0.003 mm.
| Diameter in | 1 |
|---|---|
| Diameter mm | 25.4 |
| Finish | Oil and stain resistant PVC jacket, available in various colors |
