K9 Physic Optical Prisms Lens f/ Primary School Students Experimental Instrument
Material: BK7 optical glass (K9). 45 Degree Right Angle Prism: 30 x 30 x 30mm. Trepazoid Prism: 20 x 40 x 60 mm (one side frosted）. Double Convex Cylindrical Lens: 60 x 15 x 20 mm. Double Concave Cylindrical Lens: 60 x 15 x 20 mm. ).