This is a 092-3125R-150 25.4 mm Dia. UVFS Protected Silver Plano-Concave Spherical Mirror, a high-quality optical component sourced from EKSMA Optics. The mirror has a base shape of a circle with a diameter of 25.4 mm and a thickness edge of 6 mm. It is designed to have a focal length of -75 mm, making it a concave mirror.
The mirror is made from UVFS material with the ID 1965, and it is coated with EKS 0025protsil 4000 on the front side. This coating is specifically designed for use at a wavelength of 400 nm. The mirror's geometry is spherical, and it is designed to be used in applications that require a plano-concave mirror.
According to the vendor's website, this item is currently in stock, making it readily available for immediate use. For more information about this product, you can visit the following link: https://eksmaoptics.com/optical-components/metallic-mirrors/protected-silver-mirrors/.