Replacement Coupling Collet for all of the BCN3D printers. The Coupling Collet fits in the top of the hotend and the extruder of your Sigma or Sigmax and keeps a tight grasp on each end of the Boden tube.
Manufacturer Product Number: 16198
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If there is damage to either of your Coupling Collets, the Boden tube may begin popping out during a print, even once you trip the tube. For help performing the replacement, call or email MatterHackers' support staff.