1. led lens, 2. glass material - more info check here: http://www.buymeasuringtools.com/LED-LENS-10292141/
Quick Brief
Place of Origin: Jiangsu China (Mainland)Model Number: 110NA setMaterial: GlassUsage: OpticalStructure: convex-concaveShape: Asphericlight transmittance: 93%refractive index: 1.474weight: 340gused for: 30W led chipOEM: available