Improved Grommet for the Creality Space PI

I designed this one before I realized that there were already alternatives. I prefer this one naturally. 

It's very simple to print and install. Printing it out of TPU helps it grip the tube and helps it stay in place on the dryer. 

I like to pull the PTFE tube out of the dryer sometimes when changing filament to make it easier to:

• Get the filament into the tube, 
• Push the filament into the printer 
• Catch the end of the filament as I pull it out of the printer to keep it from tangling on the spool. 

This design makes it very easy to pull the PTFE tube (or grommet and PTFE tube) in and out of the dryer while still having a fit that is secure enough when I want it to stay put.  

There is a version with an attached plug for those that want to be able to seal it.