Unused beauty in original packaging. 30mm X 30mm cube beamsplitter. Transmission and reflection is in the ratio of 50/50 (this means that the transmission and reflection are the same percent. We don't have actual specs). Made of BK7 with surface quality 60/40. Angle tolerance is +- 3 arc min and flatness is about 1/2 wave. All sides are antireflection coated.
