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30mm 40mm 50mm Glass Double Convex Concave Glass Lens Focal Length 50mm 75mm 100mm 150 mm 300mm Optics DIY Projector

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OKH Professional Custom Prescription lenses Anti Blue Light Myopia Lenses 1.56/1.61/1.67/1.74 Photochromic Myopia lenses

10 15 18 20 23 25 28 29 30 32 35 38 PMMA Plano Convex Acrylic Transparent Condenser Lens for Zoom LED Flashlight Bike Head Lamp

Optical Glass Plano Convex Lens for LED Flashlight Car Lamp Spot Light 15 18 20 22 23 28 30mm 32mm 34mm 35mm 38 40mm 43 44 50 MM