The PBS12-633-HP from Thorlabs is a UV Fused Silica Polarizing Beamsplitter Cube that operates at a wavelength of 633 nm. It has a clear aperture above 11.43 mm x 11.3 mm and reflection efficiency of above 99.5%. This laser line beamsplitter has an extinction ratio of greater than 2000:1 and a surface quality of 20-10 scratch-dig. It has a reflected beam deviation of 90° ± 5 arcmin, transmitted beam deviation below 5 arcmin, and minimum transmission efficiency of 95%. This beamsplitter has an anti-reflective (AR) coating with a reflectance of less than 0.2 and angle of incidence of zero degrees. It is RoHS & REACH compliant and is available in a package that measures 22.86 mm x 22.86 mm.