The AQSP7520OW from eSource Optics is a Optical Window with Wavelength Range 200 nm, 248 nm, 280 nm, 313 nm, 365 nm, Window Diameter 75 mm, Window Diameter 2.95 Inches, Thickness 2 mm, Thickness 0.08 Inch. More details for AQSP7520OW can be seen below.