Black spectacle style frame constructed of nylon with soft touch finish for a great combination of durability and comfort. The fit-over-prescription style frame offers universal fit with wide field of view. Lens has superior optical clarity with virtually no distortion to reduce eye fatigue. It is ideal for use in most laser applications and comfortable for long periods of wear. 340 laser filter was primarily developed for protection from laser wavelengths 950-10,600 nm offering high visibility. High optical density at 1064 nm for high power lasers. OD Specifications: OD 5+ @ 950-1000 nm OD 13+ @ 1064 nm OD 7+ @ 1000-1600 nm OD 5+ @ 1600-2400 nm OD 4+ @ 2400-2900 nm OD 5+ @ 2900-10600 nm VLT: 65% Item #151-35-340