Feature: 1. This demonstrator can vividly demonstrate the principle of submarine ups and downs, and understand the laws more vividly and intuitively.2. The demonstrator of the principle of submarine ups and downs can help students deeply understand the practical application of Archimedes' law. 3. Small and portable physics teaching instrument, simple and easy to operate, convenient for students to do it themselves. 4. When doing this experiment, you need to bring your own transparent water cup or beaker, and pour 3/4 of the water into it. 5. Do not collide or drop the diving ball gas chamber and the transparent water tank, so as to avoid rupture, prevent contact with gas, to prevent aging and cracking. Specification: Item Type: Submarine Demonstrator Package List: 1 x Diving Ball Air Chamber 1 x Latex Tube 1 x Sterile Syringe Note: 1. Do not collide or drop the diving ball air chamber and the transparent water tank to avoid rupture, and prevent contact with the reagent and air to prevent aging and cracking. 2. Drain the water in the air chamber after use, dry it and save it for later use. 1. Our listing price includes the value of goods,packaging cost,and export taxes,not including international duties. 2. duties,taxes,and charges are not included in the item price or shipping fee. 3. The duties are buyers' responsibility.Please check with your country's customs office determine what these additional costs will be prior to your purchase. 4. All disputes arising from the duties will be submitted to ebay for solution. 1. Any questions, pls. contact us via ebay message or email us.We will reply your message within 48 hours. If you do not receive our reply within 48 hours, pls. post a message again because sometimes our message system may block some emails. 2. If you are satisfied with our service, pls. kindly leave us a positive feedback and give us the Detailed Seller Rating with all "5 " in very area3. Our aim is to provide Level Customer Service, your recognition will encourage us greatly and serve you better. We strive to keep all our customers satisfy. We will do our up most to exceed your expectations in customer service, communication and dispatching of your orders. ![]() |