The WG70530-D 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 1.65 - 3.0 µm on both surfaces and has a surface quality of 40-20 scratch-dig.