Carson LinenTest 6.5x Magnifier Loupe w/20mm Lens. These Carson Magnifiers contain markings in both inches and centimeters for easy measuring of small parts. The Linen Test Magnifier by Carson is portable lightweight and folds flat for storing when not in use. Specifications for Carson LinenTest Magnifiers Loupe: Manufacturer: Carson Condition: New Color: Black Magnification Type: Fixed Features of Carson LinenTest Magnifiers Loupe Magnificatin 6.5x Lens Diameter 20 mm Package Contents: Carson LinenTest Magnifiers Loupe LT20: Carson Metal Linen Test Magnifier - 6.5x 20mm Lens