10-38mm Flat Aspheric Convex PMMA Lens for Zoom LED Flashlight Bike Front Lamp, Acrylic Optical Condenser 1 PC / 5 Pieces (5 x 20 mm)

【Versatile Size Options】Available in diameters of 10mm, 18mm, 20mm, 2.2cm, 23mm, 25mm, 28mm, 29mm, 32mm, 35mm and 38mm. Choose 1 piece or 5 pieces to fit your specific zoom torch or bicycle head lamp project. 【PMMA Material】Made of clear acrylic (PMMA) with excellent light transmission and durability. The flat-convex aspherical device effectively focuses and condenses light for brighter, more concentrated beams. 【Aspherical Optical Device】 Aspherical surface reduces spherical aberration and improves light uniformity, making it ideal for zooming LED flashlights, bicycle headlights and other optical applications that require precise light control. EASY TO INSTALL AND REPLACE:Compact and lightweight lens with standard flat-convex structure. Manual size measurement ensures tolerance within 0.3mm for reliable mounting in most flashlight lens housings. Wide Application - Perfect for DIY flashlight upgrades, optical experiments, capacitor lens replacement or custom lighting projects. Compatible with various LED zoom flashlights and bike front lights.