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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: 106.7mm, Height: 32.7mm, Steps: 4.0mm
6. Light angle: 80 x 155 polar street light lens
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