05D620ER.4 12.7 mm Dia. Borofloat Economy Broadband Metallic Mirror; t=3.1mm Protected Gold 650-20000nm

This is a 05D620ER.4 metallic mirror from MKS/Newport, featuring a circular base shape with a diameter of 12.7 mm and a thickness of 3.1 mm. The mirror is made of borofloat33, a type of borosilicate glass known for its excellent thermal stability and chemical resistance.

The mirror's coating is a new ER.4 coating on the front, designed to provide high reflectivity across a broad spectrum, from 650 nm to 20000 nm. This makes it suitable for a wide range of applications, including infrared and broadband systems.

The mirror is shaped as a thin lens, which is beneficial for applications where weight and thickness are critical factors. The vendor, MKS/Newport, provides a weblink to the product page, which is currently valid and indicates that the mirror is in stock.