Serengeti - Boron. Color Shiny Dark Gunmetal Black Shiny Acetate/Mineral Polarized 555nm. Low Stock. On sale for $217.71. MSRP $425.00.. 1 left in stockBrand NameSerengetiProduct NameBoronColorShiny Dark Gunmetal Black Shiny Acetate/Mineral Polarized 555nmPrice$217.71MSRP: $425.00Rating