10 Pieces Bottle Connectors Tornado Connector Cyclone Tube for Scientific Experiment and Test Educational experimental supplies: Good educational and fun experiment and activity for school classes, homeschoolers, scouts and any other group, stimulating kids interest to physics and study. Specifications: Color: Blue, red, yellow, purple, green, each color 2 pcs as picture shown. Length: 4.8 cm/ 1.89 inches Outer diameter: 3.3 cm/ 1.3 inches Inner diameter: approx. 2.8 cm/ 1.1 inches Material: Plastic How to use? The connector is convenient and easy to use,apply the tool to connect 2 bottles with 1/3 water,shake the bottle 4 to 5 times in horizontal direction, and then you will see your vortex spin in the bottle. Package includes: 10 x Tornado connectors If you have any problem of our product, you can click "seller contact" button in your Amazon account to email us. We are delighted to help you and we will reply as soon as we can.
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