Pro MicroSlim™ .073” (1.85 mm) Hawkeye® Pro MicroSlim Borescopes are just .073 inches in diameter, or .084 inches with a mirror tube. Use them to inspect diesel fuel-injection nozzles miniature hydraulic components and much more. Every Hawkeye® Pro Rigid Borescope is designed with professional users in mind. These top-of-the-line rigid borescopes deliver bright, clear, detailed, high-contrast images.