5X 10X 14X 20X Magnifier Loupes Headset 4 Piece Set 10X 20X Dual Loupe. This is a new double lens folding pocket magnifier. Both lenses are 10X and you can combine the two for a total of 20X power. The glass lenses used in this folding pocket magnifier provides durability for a long life. The durable plastic swing-away case not only provides a protective cover for the lenses, but serves as a handle as well. Each 10X lens has a 1" (25 mm) focal distance. When combined for a total of 20X, it has a 1/2" (13 mm) focal distance. Measures approximately 2 3/16" x 1 1/2" x 1" (56 x 38 x 25 mm) closed and 3 15/16" x 1 1/2" x 1" (100 x 38 x 25 mm) open 14X Eye Loupe. This is a new 14X plastic eye loupe. This pocket size loupe has distortion free lenses. The shape of this eye loupe allows it to rest comfortably in the eye socket. It has a focal distance of 3/4" (19 mm). Sliding Magnifier. This is a new sliding magnifier. It is handy and easy to carry. It is 5X power and has a focal distance of 1" (25 mm). The glass lens measures approximately 1 3/4" (44.5 mm) in diameter. It measures approximately 2 13/16" x 2" (71 x 51 mm) closed and 4 1/2" x 2" (114 x 51 mm) open. Lighted Magnifying Visor. This is a new lighted magnifying visor. This magnifier has many features and is easy to operate. It is lightweight and you can get a clear solid view in wide sight through the double lens' two square glass. The headband has a hook and loop strap so it is easy to adjust to the size of the user's head. It has two lights built on the side of the magnifier. It uses 4 AAA batteries (not included). The magnifier lifts up so you do not have to take it off. It leaves your hands free to work. By just sliding down one or both of the lens accessories the magnification changes. This magnifier is used by both amateurs and professionals for mold making, photography, jewelry and electronic repair. The lenses are plastic. Lens powers are: Single lens power is 1.8X. Lens plus pull down lens power is 2.3X.