Repair for a stethoscope

It has a cilindrical shape and it´s used for repairing and joining together two pieces of a stethoscope.
We have done this desing for the project "we are docs" that consists in repairing the toys that brings the pre-school kids of our school.
In our case the toy was broken in two parts and it has to be repaired creating a piece that join together the two parts of the toy.
We created this piece in a program called tinkercad that allows you to desing printable pieces.