The B-CHC011 from Ross Optical Industries is a Cube Beam Splitter that operates at a wavelength of 550 nm. It has a bevel angle of 0.3 mm x 45°, surface quality of 60-40, and surface accuracy of 1 wave. This beam splitter has an angle tolerance of ± 5 arc min and a reflection/transmission ratio of 50/50 with reflectance/transmittance of ± 5%. It has a BK7 glass substrate, 1/4 wave MgF₂ coating (outside surface), and multilayer dielectric coating (hypotenuse surface).