10-38mm Flat Aspheric Convex PMMA Lens for Zoom LED Flashlight Bike Front Lamp, Acrylic Optical Condenser 1 PC / 5 Pieces (5 x 28 mm)

【Versatile Size Selection】 Available in diameters 10mm, 18mm, 20mm, 2.2cm, 23mm, 25mm, 28mm, 29mm, 32mm, 35mm and 38mm to fit various systems of zoom of tortortortorce and bicycle lights. Choose 1 piece or 5 pieces for order. 【PMMA Material】 Made of transparent acrylic (PMMA) with a flat-convex aspherical devise, which offers excellent light transmission and focusing performance for condenser and zoom applications. 【Precision Optical Performance】 Aspherical shape reduces spherical aberration, providing a more uniform and concentrated beam of light ideal for LED flashlights, bike front lamps and DIY optical projects. 【Durable and Lightweight】Reusable plastic construction ensures impact resistance and portability, suitable for outdoor use, camping and repairing. Manual measurement of the size with error within 0.3 mm. 【Wide Compatibility】Compatible with most LED flashlight with zoom, bike headlights and custom light groups. It is not a direct replacement for all brands, measure the diameter of the lens before ordering.