The 89-422 is a UV Plano-Convex Lens, 5mm in diameter and 25mm in focal length, coated with UV-VIS for a wavelength range of 250-700nm. This lens, sourced from Edmund Optics, is a spherical lens with a Sub Type of Spherical Lens (Plano-Convex). Its base shape is circular, and it features a geometry that includes a 5mm diameter, a 1.22mm edge thickness, a 1.5mm center thickness, and a 25mm effective focal length (EFL). The lens's front and back are coated with the standard EDMM UV-VIS coating, providing excellent transmission and protection across the specified UV-VIS wavelength range. The lens material is fused sil mal-1965, and it has an inner radius of 0 and an outer radius of 0. This lens is currently in stock and available for immediate purchase through the provided weblink.