Mateial: Molybdenum Diameter: 25mm. Thickness: 3mm Pack of 3 Pcs This optical element is used for planar reflecting the laser beam and is an important component of the laser system. Molybdenum mirror is normally polished, without coating, used for tough environments. it has extremely tough surface. It has countless applications, such as Astronomy, Industry, Medicine, Optical Communication, etc..., Weight: 0.1 Kilograms, Manufacturer: Cloudray