Item Type: MagnifyingGlassMaterial: Metal, Glass LensBattery: 3 x LR927 Button Battery (Built in)Overall Size: Approx. 3.9x5x5.6cm/1.5x2x2.2inTop Width: Approx. 3.8cm/1.5inLens Diameter: Approx. 2.8cm/1.1inApplication: Magnifying Glass .wang-edit-text{ font-family:'Arial' !important; } .wang-edit-text table { border-top: 1px solid #000; border-left: 1px solid #000; } .wang-edit-text table td, .wang-edit-text table th { border-bottom: 1px solid #000; border-right: 1px solid #000; padding: 3px 5px; } .wang-edit-text table th { text-align: center; } 1Clear Scale: With scale, easy to calculate the number of weft yarns in the fabric, that is, the cross yarns of the fabric. 2Easy Folding: The magnifying glass is foldable, easy for storage and carrying, convenient for using. 3With Light: Designed with lights, this magnifier can also be used in the dark, you can see the items to be observed clearly. 4For Printing: Widely used in the printing process to determine the quality of ink and adjust the color, that is, four kinds of ink (cyan, magenta, yellow and black) hit the same point to form the desired tone. 5Widely Use: For quality control in paper and printing industry to verify the security features concealed in air tickets and passports, and for observing and using small institutions such as small circuits in electronic applications.