NoIR Laser Safety Glasses with FG1 Glass Filter for Broadband IR Lasers (Ho:YAG, Nd:YAG, Er:YAG) OD Specifications (Optical Density): OD 3+ @ 850-5200nm OD 5+ @ 945-2300nm OD 4+ @ 2300-2500nm OD 5+ @ 2800-10600nm OD 7+ @ 1010-1500nm VLT (Visible Light Transmission): 75% Included Accessories: Hard Case Neck Cord Microfiber Pouch LISTED BELOW ARE ALL INDIVIDUAL FRAME OPTIONS FOR THIS LENS FILTER Frame #53: Modern large over-prescription style Side and brow protection Comfort-fit temples CE-Certified Frame #55: Detachable Rx-insert (included) Over-prescription with side-shield protection ‘50s retro-styling Magnification inserts available CE certified Note to Customers: While we are happy to assist in identifying which laser filters and frames match the specifications you provide, you are ultimately responsible for:1. Knowing the exact wavelength and optical density that is required by and/or stated by your laser's manufacturer.2. Making your selection based on that information. Safety Glasses USA® is not responsible for any damages or injuries caused by the use of any laser, whether used properly or improperly. Safety Glasses USA reserves the right to refuse a sale to anyone whom we suspect intends to use a laser in an unlawful or inappropriate manner.