10-38mm PMMA Flat Convex Aspheric Lens for Zoom LED Flashlight Bike Head Lamp, 1PC/5Pcs Optical Acrylic Condenser Lens(1pcx15mm)

【Versatile Size Options】Available in 10mm, 18mm, 20mm, 21.8mm, 23mm, 25mm, 28mm, 29mm, 32mm, 35mm, and 38mm diameters. Choose 1 piece or 5 pieces to fit your specific zoom flashlight or bike head lamp project. 【 PMMA Material】Made from transparent acrylic (PMMA) with excellent light transmission and durability. The Flat-convex aspheric devise effectively focuses and condenses light for brighter, more concentrated beams. 【Aspheric Optical devise】The aspheric surface reduces spherical aberration and improves light uniformity, making it ideal for zoom LED flashlights, bicycle head lamps, and other optical applications requiring precise light control. 【Easy to Install & Replace】Compact and lightweight lens with a standard Flat-convex structure. Manual size measurement ensures a tolerance within 0.3mm for reliable fitment in most flashlight lens housings. 【Wide Application】Perfect for DIY flashlight upgrades, optical experiments, condenser lens replacement, or custom lighting projects. Compatible with various zoom LED flashlights and bike head lamps.