Check the listing for details. 80-91mm Optical K9 Glass Triple Triangular Prism Physics Teaching Light Spectrum. Condition: New. Listed at 5.29 USD. Store CategoriesStore CategoriesFree epacketOther Product Description Specification: 100% brand new with high quality Material: K9 Glass Size: Approx.15x15x87mm Total Length: Approx.80-91mm Weight: Approx.13g/pc Made of high quality glass, the triple prism is durable and long lasting use. Precise cuttings, offer good reflections and color separation. Easy to carry for photography, teaching, learning, presentation, etc. Creative gift for children for physics spectrum learning. Package Included: 1 x Optical Glass Triangular Triple Prism Note: Please allow minor error due to manual measurement. The colors may be a little difference for the different monitor display Payment PolicyContact UsPayment Policy 1.We ship to worldwide，I will add a tracking number in EBAY. 2. Make sure your Address is correct. A phone number is recommended for a more accurate delivery. 3.We try our best to provide you the most reliable, affordable way of shipping service. But sometimes international delivery is highly depended on the local customs and post service. If you do not receive your item on time, please contact us immediately for further assistance. We will be responsible for any damages or losses incurred in the shipping process. ·After purchase. I send goods within 12 hours. And I'll add a tracking number to the EBAY. ·This tracking number can query the Post. ● We greatly appreciate your POSITIVE feedback. Once your payment is clear, our automated process will respond by giving you positive feedback that same day. ● Negative or Neutral feedback does not resolve any underlying issues that you may be experiencing as a buyer.Any question or unsatisfaction please contact us with ebay message,we will sincerely solve for you. Contact Us ● I am very glad to solve your any problem on my items. ● Feel free to contact me via Ebay message or Email. Usually I will respond in 24 hours. ● We greatly appreciate your POSITIVE feedback. Once your payment is clear, our automated process will respond by giving you positive feedback that same day. ● Negative or Neutral feedback does not resolve any underlying issues that you may be experiencing as a buyer.Any question or unsatisfaction please contact us with ebay message,we will sincerely solve for you. Copyright © 2018 Dianxiaomi