Fabric Thread Counter Loupe Clear Scale: Easily calculate the number of weft threads in the fabric, determining the fabric's transverse threads. Easy Folding: The loupe is foldable for easy storage and portability, ensuring convenient use. With Light: Designed with lights, this loupe can also be used in the dark, allowing you to clearly see the objects to be observed. For Printing: Widely used in the printing process to determine ink quality and adjust color, ensuring the four types of ink (cyan, magenta, yellow, and black) hit the same point to form the desired tone. Wide Application: For quality control in the paper and printing industries to verify security features hidden in airline tickets and passports, and to observe and use small institutions such as small circuits in electronic applications. Item Type: Loupe Material: Metal, Glass Lens Battery: 2 x LR927 Button Battery (Built-in) Total Size: Approx. 3.9x5x5.6cm/1.5x2x2.2in Upper Width: Approx. 3.8cm/1.5in Lens Diameter: Approx. 2.8cm/1.1in Application: Loupe Includes: 1 x Loupe, 1 x Leather Case, 2 x Button Battery