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        Model:84NA
        1. Material: Optical glass (high borosilicate, K9, BK7, BK270)
        2. Light transmission: 95% (97% after coating)
        3. Refractive index: 1.474
        4. Operating temperature: -50-500 degrees
        5. Size introduction: External diameter: 86mm, Height: 30.3mm, Steps: 3.2mm
        6. Light angle: 110 x 50 short-range projection
        Model:85-13
        1. Material: Optical glass (high borosilicate, K9, BK7, BK270)
        2. Light transmission: 95% (97% after coating)
        3. Refractive index: 1.474
        4. Operating temperature: -50-500 degrees
        5. Size introduction: External diameter: 85mm, Height: 26.7mm, Steps: 4.0mm
        6. Light angle: 130 x 60 polar light street light lens
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