✅ GENUINE 4-IN-1 FILAMENT HUB REPLACEMENTThe AMS Internal Hub Unit is the material selection device (4-in-1-out) of the Bambu AMS system. It opens the correct feed port based on the selected filament position and delivers filament from the AMS to your printer. Essential for restoring full multi-color and multi-material printing functionality when your original hub fails.✅BUILT-IN SPEED MEASUREMENT & FILAMENT DETECTIONEquipped with Hall sensors and an odometer wheel, this unit accurately measures filament conveyance speed and detects filament presence. The integrated sensors ensure reliable filament tracking and prevent failed loads or unloads caused by sensor abnormalities✅ELIMINATES FILAMENT JAMS & SLIPPINGIf your AMS frequently fails to feed or retract filament—or you're experiencing the "assist motor has slipped" error (HMS_0700-0100-0001-0001)—the internal hub's extrusion wheel or bearing support may be worn. Replacing this unit restores smooth filament movement and eliminates frustrating print interruptions✅EASY DIY INSTALLATIONDesigned as a direct drop-in replacement for the original Bambu Lab AMS Internal Hub Unit. Installation takes approximately 20 minutes with basic tools (H2.0 & H1.5 hex keys). Bambu Lab's official Wiki provides step-by-step replacement guides. Note: Keep all screws from your original unit for reuse✅OFFICIAL COMPATIBILITYFit for Bambu Lab AMS of X1, X1 Carbon, P1P, P1S series. **NOT compatible with AMS 2 Pro**. Package includes: 1 × AMS Internal Hub Unit.