This is the MGS1502, a 15 x 15 mm general purpose grade plane mirror, sourced from Knight Optical. The mirror is rectangular in shape and has a thickness of 3mm, making it a thin lens type of optical element.
The mirror is made of soda lime, a common material in the optical industry, and it has a clear finish. The mirror's coating is a silver ion-plated type, which is known for its high reflectivity across a wide spectrum, ranging from 450nm to 2000nm. This makes the mirror suitable for a variety of applications, including those that require both visible and infrared light reflection.
The MGS1502 is currently in stock and available for immediate purchase. For more information, you can refer to the vendor's website through the provided weblink.