10-38 mm PMMA Flat Convex Lens for Flashlight, Bicycle Lamp, DIY Optics, 1 pc.(1pcx20mm)

【Versatile Size Range】Including diameters 10mm, 15mm, 18mm, 20mm, 23mm, 25mm, 28mm, 29mm, 30mm, 32mm, 35mm, 36mm. and 1.49 6" to fit various applications of flashlights and lamps for bicycles. 【PMMA Material】Made of durable acrylic (PMMA) with aspherical -convex device, which ensures efficient light convergence and minimal distortion for optical projects. 【Precision Optics】Aspherical surface reduces spherical aberration, providing a focused and uniform beam ideal for zooming flashlights, bicycle headlights and DIY lens experiments. 【Easy to Install】Lightweight and reusable plastic construction with manual size tolerance of 0.02mm, compatible with standard lens holders and DIY frames. 【Individual Package】Includes 1 piece of flat convex condenser lens, perfect for replacement, repair or custom optical constructions without extra waste.