About this 3D model

This is a replicator 2x extruders for flexible filament like Ninjaflex or Filaflex. I have done small upgrade from http://www.thingiverse.com/thing:222667 to be compatible with smaller springs and really flexible filament. A small puffiness avoid to block flexible filament into the extruder. You can use all kinds of plastics with this. Enjoy