Yes, not everyone needs such an adapter in the house, but those who are in the subject know its use and price ... Therefore, there is not much point in explaining why and where, I will only make a couple of recommendations for manufacturing, which you can safely ignore :) . It is better to print the base on a photopolymer printer, everything is very small, and the cap is made of TPU. Well, then you know better than me what to do with it and where to shove it ;)