The AQCF7550OW from eSource Optics is a Optical Window with Wavelength Range 157 nm, 193 nm, 248 nm, 308 nm, 350 nm, Window Diameter 75 mm, Window Diameter 2.95 Inches, Thickness 5 mm, Thickness 0.2 Inch. More details for AQCF7550OW can be seen below.