Ray Black zalando Acetate Technology:

Acetate Technology:

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✓ CR-39 Lenses (Blue light technology)

Ray Black zalando Acetate Technology:Ray Black Square shape. Frame Color: Black Lens Color: Dark grey 1 Year Warranty Technical Information: Hand PolishedWidth Nose Gap Height Measurements of this pair: 145 20 52 mmHinge: Five barrel Front thickness: 6. 0 mm Temples thickness: 4. 0 mm Lenses Technology: CR 39 Lenses. CR 39 is made by polymerization of diethyleneglycol bis allylcarbonate (ADC) in presence of diisopropyl peroxydicarbonate (IPP) initiator."CR 39" is an abbreviation of