Have a broken flashlight lying around? Don't throw it away and let it take up space in landfills! Purchase this 99% Transmittance Glass Optic and make the necessary repairs yourself! This 66 millimeter by 24 millimeter concave lens is the perfect replacement for many flashlight accessory models. Its primary use is to magnify the intensity of the light beam of flashlights of suitable size but it can also be used in a variety of other DIY projects due to its versatile design. The glass is clear and heavy-duty so it does not cause a scattering effect the way that poorly made lenses can.