Sumind 8 Pieces Tornado Bottle Tube Make a Tornado in a Bottle Cyclone Tube Plastic Bottle Vortex Connector Tornado Connector for Scientific Experiment Educational Tool and Test 5 Colors

8 Pieces tornado bottle tube make a tornado in a bottle cyclone tube plastic bottle vortex connector tornado connector for educational tool and test, 5 colors Reliable material and proper size: Cyclone tube is made of lightweight plastic, light in weight and allows you to carry around, each piece measures approx. 4.8 x 3.3 cm/ 1.89 x 1.30 inches, compact and portable, which fits most bottles, with stripes pattern designs on the surface, making it easier for you to rotate, which can save your time and energy. Bring in colors: Comes with 8 pieces tornado bottle connectors, 5 bright colors are provided. This plastic tornado connectors have educational meaning, ideal experiment tool for school, classes which can help increase children's intelligence and stimulate their interest to physics and study. Specification: Material: plastic Color: yellow, green, blue, red, purple Size: 4.8 x 3.3 cm/ 1.89 x 1.30 inches Package: bag Package includes: 8 x Tornado bottle tubes Note: Manual measurement, please allow slight errors on size. The colors may exist slight difference due to different screens.