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Precision-molded PMMA -convex lens focuses light efficiently for zoom flashlights, bike headlamps, and lanterns. Aspheric devise reduces spherical aberration, delivering a smoother, more concentrated beam for enhanced optical performance. Available in 10mm, 18mm, 20mm, 21.8mm, 23mm, 25mm, 28mm, 29mm, 32mm, 34mm, and 38mm diameters to fit various lamp housings. High light transmittance and low dispersion acrylic material ensures bright, clear output while remaining lightweight and impact-resistant. Simple drop-in replacement for DIY repairs or custom builds; compatible with standard LED flashlight and bike lamp lens mounts.