Set Of Master Gauge Consist Of Nine Materials. (Each Quantity One No.) 1. 150 Mm Od Master With Thickness 40 Mm & Accuracy /- 0.002 Mm. 2. 170 Mm Od Master With Thickness 40 Mm & Accuracy /- 0.002 Mm. 3. 180 Mm Od Master With Thickness 40 Mm & Accuracy /- 0.002 Mm. 4. 198 Mm Od Master With Thickness 40 Mm & Accuracy /- 0.002 Mm. 5. 100 Mm Od Master With Thickness 40 Mm & Accuracy /- 0.002 Mm. 6. 105 Mm Od Master With Thickness 40 Mm & Accuracy /- 0.002 Mm. 7. 184 Mm Od Master With Thick