This is a Plano-Convex Lens, type 38-570, with a diameter of 6.0mm and a focal length of 25mm. The lens is sourced from the reputable vendor, Edmund Optics, and is currently in stock. The lens is made of the high-quality material, n-bk7 schott, and features a YAG-BBAR coating on both the front and back surfaces. This coating is designed to operate within the wavelength range of 500-1100nm, making it suitable for a wide range of optical applications. The lens has a center thickness of 1.45mm and an edge thickness of 1.1mm, with an effective focal length (EFL) of 25mm. The front surface of the lens has a radius of curvature (R1) of 12.92mm, and the back focal length (BFL) is 24.04mm. The lens has a spherical shape and a circular base shape. For more detailed information, please refer to the provided parameters.