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Includes everything you need to demonstrate basic principles of light and color. Includes - Double convex lens, 38 mm. dia. glass Double concave lens, 38 mm. dia. glass Plain lens, 38 mm. dia. glass Clear glass screen 2 mirrors, square and acrylic 3 lens/mirror supports 5 cellophane squares in 5 colors Reusable storage box Activity guide Candle Plastic screen, white Flashlight Beaker 2 prisms equilateral