This is the 14SM-3, a 76.2 mm diameter UVFS Flat Metallic Mirror, manufactured by Standa. The mirror is designed with a protected silver coating on the front surface, optimized for a wavelength of 550nm. The mirror's geometry is defined by a circular shape with a thickness of 8mm, categorizing it as a Thin Lens.
The mirror's material is UVFS, identified as Mal- 1965, and it is available for purchase from Standa's official website, where it is currently listed as in stock. The mirror's specifications make it suitable for a wide range of optical applications, particularly those requiring precise reflection at the 550nm wavelength.
For more information about this product, you can refer to the vendor's website provided in the item data. The link is valid and directs to the specific page for metallic coated optics, where you can find this mirror and other similar products.