Description: Application: Sound propagation experiment The bell on the bell with a bell above the sound of the bell, bells can still hear a clear electric bell, and then extract the air bell, electric bells will gradually weaken until the sound can not hear, close the exhaust valve , So that Students observe, bell bell hammer is still kept ringing bell, but can not hear the sound. 2. Low-pressure boiling test. A cup of hot water has discharged boiling into the bell jar, and then pumping, you can see the cup of hot water and boiling up. In addition the instrument can also be used: vacuum fountain, evaporation icing, vacuum coating, atmospheric pressure and Other experiments. Specification: Max height: 28cm Max diameter: 18cm Main material: glass and plastics Weight:1.6kg Note: You need a vacuum pump to do the experiment.PaymentDelivery detailsTerms of salesAbout usContact usPayment1. If for any reason you are not satisfied with the transaction, please contact us to resolve it prior to placing a nagative feedback. 2. All payments must be made within 4 days of purchaseDelivery details1.The order will be processed within 5 working days after receipt of payment. 2. We only send the goods to the address that is registered on your PayPal account, and this address must match your delivery address. 3. The delivery time depends on the courier company. It takes about 10-25 working days local in Germany, about 10-30 working days to other European countries. The delivery time may be a little longer between the holidays. 4.If you haven't received your goods within 30 working days after paying, please contact us immediately. We will track the delivery for you and give you an answer as soon as possible. Our goal is your satisfaction. Terms of sales100% satisfaction guarantee. However, if for any reason the item does not match the description，please contact with me with mail directly.About us1. Please add my eBay shop to your "My Favorites" list. If you like our products, We always strive to offer our customers high product quality, reasonable prices, excellent customer service and a reliable credit rating. 2. We appreciate your POSITIVE feedback. Please DO NOT leave negative feedback without asking for help. 3. Please DO NOT leave negative or neutral feedback if you have not received an item within 30 days as we have repeatedly given the delivery time. 4. Our goal is to provide first class customer service so we will try our best to resolve any problem. Contact us1. Working hours: Monday to Saturday (Beijing time 9:00 a.m. to 6:00 p.m.) 2. Please contact us via Ebay message. We will reply you within 24 hours. as quickly as possible. 3. Please contact us before leaving any dispute or negative feedback. 4. Please resend your email if you do not receive our reply.
Price: 56.99 USD
Location: China
End Time: 2024-12-24T10:21:45.000Z
Shipping Cost: 9.99 USD
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Item Specifics
Restocking Fee: No
Return shipping will be paid by: Buyer
All returns accepted: Returns Accepted
Item must be returned within: 30 Days
Refund will be given as: Money Back
Usage: Home DIY
is_customized: No
Model Number: Yu
Brand: Unbranded
