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An entire optics set at a great price! Includes everything you need to demonstrate basic principles of light, and color. Comes in a reusable storage box. Contents: 1-Double Convex lens, 38 mm diameter, glass; 2-Prisms, equilateral, 25mm x 50mm, acrylic; 1 Double concave lens, 38mm diameter, glass; 1-Plain lens, 38mm diameter, glass; 2-Mirrors, square, acrylic; 2-Plastic mirror supports; 1-Wooden lens holder; 1-Beaker, graduated, plastic; 1-Flashlight (2 batteries included); 1-Plastic Screen, white; 1-Clear glass screen; 1-Candle; 5-Cellophane squares in 5 colors; 1-Activity Guide, Containing 20 experiments