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Prism Optical Glass Cylinder Cube Pyramid Ball Triangular Prism Scientific Experimental Instruments Photography Decorative Present Specifications Cylinder: Material: glass Color: clear Diameter: 40mm Height(thickness): 40mm Net Weight: 132g Cube: Material: K9 (BK7) optical glass Size: 40x40x40 mm Pyramid: Material: K9 optical glass Height: forty mm Ball: Material: K9 optical glass Color: transparent Diameter of the Ball: forty mm Weight of the Ball: about eighty g Triangular Prism: Material: K9 (BK7) optical glass Side Length: 4cm Package Including 1x Glass Craft