Shrinking Device

This is a one of the two parts that are in the invention that I found in the following you tube video, i want to give the credits to the channel and the people that made it, because I think is quite interesting for the maker's community. This part I desing by my own is the protection part of the piece of the cone that works as a magnifying glass. The other part is make of Ulexite or TV Rock, that I recommend to buy it on internet and give it the shape with a lathe and fire. I recommend to watch carefully the video to understantd how it works. Thanks for supply my work (this is my first piece). :) The means are 40 and 80 mm of diameter, 80 mm of large, and the raius from the exterior of the shape 60 mm. The thickness is 2 mm.