This is a Plano-Convex Lens, type Lens, subtype Spherical Lens, base shape Circular, and geometry as follows: The diameter of the lens is 25.4 mm, the thickness at the edge is 2.2 mm, and the thickness at the center is 4.5 mm. The effective focal length (EFL) is 75 mm, the radius of curvature (R1) is 35.705 mm, and the inner and outer radii are 0 mm.
The lens is made of UVFS MAL-1965 material, designed for a wavelength of 355 nm, and has a spherical shape. The coating is not specified, indicating that it is likely uncoated.
The vendor of this lens is Standa, and the web link provided is valid and in stock. This information is sourced from the Standaphotonics website, where you can find more details about this product and other optical elements.