3.3X 4X 7X 10X Jewelers Watchmakers Eye Loupes Magnifiers This is a new set of 4 plastic clip on eye loupes. These pocket size loupes have distortion free lenses. The shape of these loupes allows each to rest comfortably in the eye socket. You receive: One 3.3X loupe with a 3" (76.2 mm) focal distance One 4X loupe with a 2 1/2" (63.5 mm) focal distance One 7X loupe with a 1 1/2" (28.1 mm) focal distance One 10X loupe with a 1" (25 mm) focal distance