/ Precision Measuring Tools / Gage Blocks / Optical Polygons and Flats / OP 8.0 * Not actual product image OP 8.0 Optical Polygon Optical Polygons 8-Sided Optical Polygon, Grade 0 Webber Optical Polygons provide an easy, accurate method of checking and calibrating angles. They are designed for use with autocollimators in measuring angle spacing. The exclusive one-piece design provides compact, fixed master for precise angle spacing Features Specifications Product Testimonials Other similar products OP 10.0 Optical Polygon OP 10.1 Optical Polygon OP 12.0 Optical Polygon OP 12.1 Optical Polygon OP 2009.1 Optical Polygon OP 2009.2 Optical Polygon OP 2009.3 Optical Polygon OP 3.0 Optical Polygon OP 3.1 Optical Polygon OP 4.0 Optical Polygon OP 4.1 Optical Polygon OP 5.0 Optical Polygon OP 5.1 Optical Polygon OP 6.0 Optical Polygon OP 6.1 Optical Polygon OP 8.0 Optical Polygon OP 8.1 Optical Polygon OP 9.0 Optical Polygon OP 9.1 Optical Polygon Contact Starrett Features Target faces are highly reflective and optically flat. Chrome carbide polygons provide a hardness of Rockwell 71-73 C Corrosion resistance 10-20 times that of 18-8 stainless steel Lifetime accuracy Maintenance problems are virtually eliminated 1" mounting hole, flanged bushing, lapped washer and hold-down bolt furnished with each unit Furnished in case Certificate of Calibration included Specifications Number of Sides: 8 Angle Spacing Degrees: 45 Accuracy Grade: 0 Product Testimonials Write a product review Write a product review Comments* First Name* Last Name* Email* Occupation The information you provide will be used in accordance with the terms of our privacy policy. I agree to the privacy policy. Please provide the required information. Thank you for submitting a product testimonial on www.starrett.com. By submitting information to Starrett, you acknowledge and give express permission for the L.S. Starrett Company to use and share your statements.