This is a 092-3125R-300 UVFS Protected Silver Plano-Concave Spherical Mirror, sourced from EKSMA Optics. The mirror has a diameter of 25.4 mm and a thickness of 6 mm at the edge. It is designed for use with a wavelength of 400 nm and features a UVFS material ID of 1965.
The mirror's geometry is spherical, with a radius of curvature (R1) of -300 mm, resulting in a focal length (EFL) of -150 mm. This concave mirror is coated on the front side with EKS 0025protsil 4000, a protected silver coating.
For more information and to check the current stock status, please visit the vendor's website using the provided weblink: https://eksmaoptics.com/optical-components/metallic-mirrors/protected-silver-mirrors/