Check the listing for details. Eschenbach Clip On Spectacle Magnifier 4X Powered - Model: 1646-40. Condition: New. Listed at 163.20 USD. Magnifying Aids - Your Low Vision StoreEschenbach Clip On Spectacle Magnifier 4X PoweredEschenbach Authorized DealerClip-on magnifiers are designed to provide spectacle wearers with hands-free magnification. Fits Over Prescription Eyewear, Replacement Lens are available separately (1645-3), Will Fit Glasses up to 15 mm Thick, Protective Rubber Tips on Clamp. Lens is set 2 inches from eye, allowing for a more comfortable working distance. When not needed, the lens can be flipped up and out of the way. Lenses are interchangeable for different magnification needs Features: * Magnification: 4x * Diopter: 16.0D * Lens Type: Aspheric * Lightweight * Case: no * Case Material: no * Mount: no * Lens Material: PXM Plastic with Cera-Tec Coating * Bridge Size: 25 mm * Working Distance: 130mm * Rx-able: no * Fits most eyeglass frames (Bridge: 25mm, Jaws open 15mm) Manufacturer: Eschenbach Origin: Germany Model: 1646-40 Item: 164640