1. led lens of glass, 2. led lens for 10w 15w chip, 3. SGS approved - more info check here: http://www.buymeasuringtools.com/led-glass-lens-10292716/
Quick Brief
Place of Origin: Jiangsu China (Mainland)Model Number: 57NAMaterial: GlassUsage: OpticalStructure: convex-concaveShape: Asphericrefractive index: 1.474light transmittance: 93%heat-resistant: temperature 500~600 degree