The AQCF1220OW from eSource Optics is a Optical Window with Wavelength Range 157 nm, 193 nm, 248 nm, 308 nm, 350 nm, Window Diameter 12.5 mm, Window Diameter 0.49 Inch, Thickness 2 mm, Thickness 0.08 Inch. More details for AQCF1220OW can be seen below.