Single crystal sapphire optical window, Dia12.7mm*T3.18mm, #SS-OW-12.7-3.18-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.