6 mm) Monochromatic Beams Air Gap Design Allows for use with High Power Beams Available Uncoated (190 2500 nm) or with One of Three AR Coatings 350 700 nm ( A Coating) 650 1050 nm ( B Coating) 1050 1700 nm ( C Coating) Damage Threshold Specifications Item # Suffix Damage" name="description"/> 6 mm) Monochromatic Beams Air Gap Design Allows for use with High Power Beams Available Uncoated (190 2500 nm) or with One of Three AR Coatings 350 700 nm ( A Coating) 650 1050 nm ( B Coating) 1050 1700 nm ( C Coating) Damage Threshold Specifications Item # Suffix Damage" property="og:description"/> 6 mm) Monochromatic Beams Air Gap Design Allows for use with High Power Beams Available Uncoated (190 2500 nm) or with One of Three AR Coatings 350 700 nm ( A Coating) 650 1050 nm ( B Coating) 1050 1700 nm ( C Coating) Damage Threshold Specifications Item # Suffix Damage" name="twitter:description"/>