Custom Titanium multi-hole reference standard. Contains 9 hole sizes; 2.0mm, 2.5mm 3.0mm, 3.5mm, 4.0mm, 4.5mm, 5.0mm, 5.5mm and 6.0mm, 6.5mm. 7.0mm, 7.5mm, 8.0mm, 8.5mm, 9.0mm, 9.5mm, 10.0mm, 10.5mm, 11.0mm, 11.5mm, 12.0mm, 12.5mm, 13.5mm, 14.0mm, 14.5mm, 15.0mm, 15.5mm, and 16.0mm hole diameters. EDM notch 0.5mm X 7.5mm deep in each hole (half of the material thickness). Material: 6AL-4V Titanium 15mm Thick. Includes Test Report and Certificate of ConformanceTraceable to NIST.