Starlight Instruments 2" Collimator with 635NM

• 2" Single red beam operates at 635nm The Howie Glatter Collimator incorporates a solid state laser diode that does not fade or change with time and use Factory-aligned to 15 arc-seconds providing 0.1 inch accuracy at a distance of 20 feet The Howie Glatter Laser Collimator is shock resistant to keep its alignment - even when dropped Includes 123A lithium battery, 1mm aperture stop, and protective case

• Item Reference: B07WTX9D5S