Funnel for the hydraulic oil. Compatible with Biglia/Eurotech B470 S2M / B465 S2M / B470 S

This Funnel was designed for make easy to refill the tank of the hydraulic oil because all of the older machines in the workshop where I work leaks oil like blood from a man sick of Ebola. With this funnel I can do the job myself, without asking for help from the other workers.
The model need to be printed in flexible materials, like TPU because the internal diameter is a push-fit with the diameter of the tank of the older Eurotech/Biglia model. By the way, TPU is a oil-resistant material, so the funnel will not dissolve in a couple of months.

The funnel's model is made by two .STL for an optimized print with an FDM printer. No support needed. You just need to orient the model the right way. The funnel with the spout upwards and the adapter with the curve upwards.

Below is a list of machines on which I have tested the funnel. Any machine of the same manufacturer and of the same era should be compatible, unless the diameter of the tank changes:

Biglia/Eurotech B470 S2M
Biglia/Eurotech B465 S2M 
Biglia/EurotechB470 S