This is a Plano-Convex Lens, type Lens, subtype Spherical Lens, base shape Circular, and geometry as follows: The diameter is 25.4 mm, the thickness at the edge is 3.6 mm, and the thickness at the center is 4 mm. The effective focal length (EFL) is 400 mm, the radius of curvature (R1) is 190.429 mm, and the inner and outer radii are 0 mm.
The lens is made of UVFS material with the ID 1965 and is designed for use with a wavelength of 355 nm. The lens has no coating, as indicated in the item data.
The vendor of this lens is Standa, and the item is currently in stock, as indicated by the "weblink status" field in the item data. The item data also provides a link to the vendor's website for further information.