6-Piece Acrylic Prism and Lens Set with Wooden Storage Geology_Geology Charts & Models Two rectangular slots accept square

Two rectangular slots accept square or round rods up to 16 mm in this aluminum alloy multipurpose clamp holder

Cutaway working steam engine model with piston

providing the standard mid-range value for current-limiting LEDs and dropping resistors in student circuits

demonstrating mechanical-to-electrical energy conversion as the crank lights the bulb

Twenty-nine labeled features across outer

6-Piece Acrylic Prism and Lens Set with Wooden Storage Geology_Geology Charts & Models Two rectangular slots accept squareSix piece transparent acrylic prism and lens set with all faces polished, packaged in a wooden storage box, covering core dispersion and refraction shapes for ray box optics work.