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1. Material: Korea NV55 2. Refraction Index Nd: 1.561
3. Diameter: 55/60/65/70mm
4. Abbe Value: 38
5. Coating Colour: Yellow green coating
6. base Colour: Transparent (grey brown for photochromic)
7. UV Number: 380/400
8. Power Range: 0~(+)-1000/0~(+)-400 (if the lens is photochromic, it will have 9)
9. Available Color: Grey/Brown
