This is a 3D printed reproduction of a Soleus air portable air conditioner 5" hose adapter (P-LX140-35).
It is printed in heat resistant plastic. It is thicker and more ridged than the original part, but works the same.
This part is compatible with a number of Soleus ACs including the common Soleus LX-140BL, PH5-13R-35D, PH4-13R-01, PE3-12R-03, and PH5-13R-35S