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Free standard shipping on orders over $69
Estimated to be delivered 4-14 days.
You may return most new, unopened items within 30 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).
You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).
If you need to return an item, simply login to your account, view the order using the "Complete Orders" link under the My Account menu and click the Return Item(s) button. We'll notify you via e-mail of your refund once we've received and processed the returned item.
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Stirling engine is a nice education model for students and teachers. It can help to better understand the working principle.
Features:
A Stirling engine is a heat engine that operates by cyclic compression and expansion of air or other gas (the working fluid) at different temperatures, such that there is a net conversion of heat energy to mechanical work.Â
Teacher can make the explaining process much straightforward and students can better understand its principle.Â
Run freely on the top of a cup of hot water, no need to fire a alcohol lamp,safer for children.Â
Start temperature difference between the product bottom contact and circumstance should be greater than 25℃.Â
Gently flip the wheel, then it can run itself.Â
Exquisite frosted plunger can avoid steam leakage and the reduce abrasion.Â
If the friction between flywheel and support is big, please use a little graphite dry lube quiet it down nicely. Don't use oil, because it will lead to oil-dirt.
Specifications:
Wheel Color: Gold / Purple (Optional);Â
Material: Stainless steel+spray paint carbon steel+glass;Â
Principle of Operation: Heating expansion / cold compression;Â
Speed: 180rpm (max.);Â
Item Size: 12.2 * 10.2 * 10.2cm / 4.8 * 4 * 4in;Â
Item Weight: 250g / 8.8oz;Â
Package Weight: 333g / 11.7oz;Â
Package Size: 17.3 * 9.5 * 11cm / 6.8 * 3.7 * 4.3in;
Package List:
1 * Low Temperature Stirling Engine Model DIY Kit;Â
1 * User Manual Manual;
Note:
Children under 12-year-old should be accompanied by adult when playing this product.
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You have 30 days from the date of delivery to return your item.
The majority of returns are refunded via store credit in the form of a JustgreenBox gift card. Returns are processed within 5-7 business days after your item(s) are delivered to us. To receive your store credit more quickly, use the prepaid return label in our Returns Portal !
We can ship to virtually any address in the world. Note that there are restrictions on some products, and some products cannot be shipped to international destinations.
When you place an order, we will estimate shipping and delivery dates for you based on the availability of your items and the shipping options you choose. Depending on the shipping provider you choose, shipping date estimates may appear on the shipping quotes page.
Please also note that the shipping rates for many items we sell are weight-based. The weight of any such item can be found on its detail page. To reflect the policies of the shipping companies we use, all weights will be rounded up to the next full pound.
| Drostique | Nam tempus turpis at metus scelerisque placerat nulla deumantos |
| Pharetro Lorem | Pellentesque diam dolor elementum etos lobortis des mollis |
| Milancelos | Donec pretium egestas sapien et mollis |
| Pellentesque | Sedcus faucibus an sullamcorper mattis drostique des commodo pharetras |
| Proin Molestie | Pellentesque diam dolor elementum etos lobortis des mollis |
| Cosmopolis | Donec pretium egestas sapien et mollis |
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