Triangular color prism optical right angle material students experimental #QA ZX

Description

Name: three prism (first class)
Use: an optical teaching tool or other
Size:
50mmX30mmX30mm, 100mmX30mmX30mm, 150mmX30mmX30mm, 180mmX40mmX40mm, 200mmX30mmX30mm
Material: K9 optical glass
Packing: fine small gift box
How to use the three prism in the sun or with a bunch of white light, by turning the three prism on a plane (which is all in three planes), and there will be a rainbow of seven colors (red, orange, green and purple blue) on the wall, and the child has a three prism to get the child to get a preliminary refraction of the light. To stimulate children's curiosity and exploration, children can fully understand the phenomenon of light.
Special reminder: when a buyer receives a three prism, he must put the three prism box on the table and then open it! Because the buyer in front of the buyer had dismantled the package, then picked up the three prism box and opened it. As a result, the three prism box was opened wrong, the three prism box turned over, the three prism dropped directly on the ground! Especially children, looking forward to the baby, opening the box is not the right way, resulting in a bad phenomenon! This is very disappointing and very regrettable, so please be careful when you receive the three prism.
The three prism box has a foam lining on the back of the back of the silk silk, both beautiful and storage and transport protection, so the transport process is very safe, three prism damage basically appears in the first open box caused drop fall!
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hipping address: We ship the item to your Paypal address. So please double check it.
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ombine shipping: If you buy more than 1 item, we will give you 10% discount of total shipping fee.
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end out time: The item will be shipped out in 3 days after clear payment.
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elivery time: Depending on destination.Post strike,storm,volcano etc are not considered.
Table of delivery time(typical countries)
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aying method: We accept Paypal only.
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aying time:Payment must be made within 7 days after the auction end.
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efect of item:Please contact us in 7 days after receving it and we will refund or reship it as you like. But the customers must pay shipping fee.
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ize change:You can change it, but you need pay shipping fee.
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islike item:If you dislike the item after your receiving it, you can send it back and we can refund after our receiving it.
But you need pay shipping fee.