Specification:Quantity: 1 pieceColor: silverMaterial: metal, glass lensSize: as shown in the picturePacking list:1 x 10x 20x Folding magnifying glassPros:-Jewelry magnifiers with two magnifications -Jeweler's loupe is a metal construction with crystal clear lenses- very portable, easy to carry-leave on work table and not take up room-This little loupe offers clear, powerful magnification- comes with a small hard plastic felt lined storage caseTwin-lens Usage:(1)for 10X lens, according to personal vision, your eyes should be about 1cm from the lens and the specific object should be about 1-2cm from the lens.(2)for 20X lens, according to personal vision, your eyes should be about 0.5cm from the lens and the specific object should be about 1cm from the lens.