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Precision-molded PMMA convex lens with 95% light transmittance and 1.474 refractive index, delivering efficient beam focusing for zoom LED flashlights and bike head lamps. Available in 11 diameter options (10/15/18/20/23/25/28/29/30/32/35/38mm) to match diverse housing designs; edge/step structure simplifies mounting and alignment. Wide working temperature range from -50°C to 450°C ensures stable optical performance in outdoor or high-heat environments. Each lens is individually measured with a tolerance within 0.3mm, ensuring consistent fit and reliable optical alignment for DIY or replacement projects. Suitable for use with standard LED light sources; compatible with common flashlight bodies and bike lamp mounts (no adhesive or frame included).