Single crystal sapphire optical window, Dia25.4mm*T2.25mm, #SS-OW-25.4-2.25-M.

Clear Aperture >=90%, Random Orientation, Parallelism <=3arcmin, Surface Flatness lambda over clear aperture, Surface quality 60/40, surface roughness Ra<=0.3nm, Wavelength Range >=84% at 308nm.