10pcs 50x50x1.2mm Optical Beamsplitter Mirror Semi-Transparent Semi-Reflective Glass Teleprompter Beamsplitter Galss Plate Prism

10pcs 50x50x1.2mm Optical Beamsplitter Mirror Semi-Transparent Semi-Reflective Glass Teleprompter Beamsplitter Galss Plate Prism

AliExpress