Check the listing for details. 10Pcs Diameter 15mm High 5mm PMMA Flat Convex Lens Flashlight Optical Lens. Condition: New. Listed at 15.58 USD. Optical glass convex lenses are widely used in LED lighting products, such as car lights, bike headlights, focusing flashlights, spotlights, downlights, condensers, optics, floodlights, and other lighting accessories, etc.SpecificationColor: TransparentMaterial: PMMA (Acrylic )Shape: Flat ConvexLens Outer Diameter: approx.15mm/0.59inchLens Height: 5mm/0.2inchPacking List: 10 x LED Optics Flat Convex Condenser LensAdvantageMade of PMMA (Acrylic) material, it is high-temperature resistant, not easy to age, and has high light transmission.The beam spots irradiated through the optical lens are uniform, without black holes, shadows, or dark areas.InstructionThe installation is simple. Remove the old optical lens of the flashlight lamp holder and replace it with a flat convex lens.