The Anycubic Kobra 3 Series / Kobra 3 Max Pneumatic Fitting Retaining Ring is a small C-type clip or latch designed to secure quick air fittings (push-to-connect heads) to the filament feed system.

• Screw lock security: Naturally prevents the upper release ring of the airtight fitting from bending or slipping inward under pressure during rapid multi-color tool changes.
• Anti-wobble: Prevents micro-movements of the PTFE tube inside the quick-connect port, maintaining precise retractions and preventing filament jams.
• Tool-free installation and removal: Features an open textured C-type lock profile, allowing users to secure or remove it by hand.
• Durable polymer material construction: Made of flexible yet durable plastic that withstands repeated locking cycles without breaking or deforming.