Mitutoyo 158-117 Series 158 Optical Flat, Metric, Diameter 45 mm, Thickness 12 mm, Flatness 0.2 um

The Mitutoyo optical parallel is made of optical-grade glass and is used to measure the parallelism and flatness of a micrometer's measuring face.

Features:

• Constructed from highly polished, lapped optical-grade glass
• Used to inspect the flatness of metal, ceramic, and other materials
• Supplied in a fitted wooden case