The 10x20 Blueline Compact Binocular from Barska is a stylish, retro design Porro binocular with BAK7 glass. The optics are fully coated and the housing is made from durable aluminum alloy. The attractive silver finish projects the petite and utilitarian body shape to an even higher level of visual appreciation. The aluminum skin follows the shapes of the prisms and objective lenses. A right eye diopter adjustment ring, center focus knob and fold-down rubber eyecups deliver a package that is comfortably customizable to the discerning user.