The WW70530-E3 from Thorlabs is a Wedged Optical ZnSe Window that operates at 633 nm. This 12.7 mm in diameter window has a thickness of 3 mm and a clear aperture of more than 11.4 mm. This optical window has an AR coating range from 7 - 12 µm on both surfaces and has a surface quality of 40-20 scratch-dig.