Check the listing for details. Front Surface Reflector Mirror First Surface Projector Lens High Reflectivity. Condition: New. Listed at 31.33 USD. 250X150 270X150 270X180mm Front Surface Reflector Mirror 10.1 11.6 12.1 Inch First Surface Projector Lens High Reflectivity Specifications: Projector Reflector Lens Material: Glass Reflectivity: 97%(Theoretical reflectivity value), actual measured reflectivity is around 95% Size: 250X150mm, 260X150mm, 270X150mm, 270X180mm Thickness: 3mm Quantity: 1 PC The side with protection film is front coated reflector mirror. What is a front surface coated reflector mirror? An optical element that reflects a layer of incident light on a surface of an optical glass substrate by vacuum plating a layer of metallic aluminum film. Because it is the reflection of the first reflecting surface, the reflected image is not distorted, and there is no ghosting, which is a front coated mirror. The front surface is coated with aluminum film and silica protective layer. The function of silica protective layer is to protect the aluminum film from oxidation. Welcome to customize! Other size, shape and thickness, please contact us!