Description/Features: The quintuple assembly is used to switch filaments during multi-color or multi-filament printing. One end of the quintuple assembly is connected to 4 different Teflon tubes (up to 4 filaments), while the other end is connected to the top of the extruder for feeding. Function of (4-in-1 PTFE connector) (applicable to X1/P1/A1 series + AMS) 1. Main function: This connector is a key component for multi-material printing (MMU, Multi-Material Unit), used to connect AMS (Automatic Material Switching System) and the printer hot end to achieve automatic switching of 4 different colors/materials. 2. Specific function: Merge 4 PTFE tubes (from AMS) into 1, so that 4 materials can enter the hot end through the same path. 3. Applicable models: X1/X1C (AMS required); P1P/P1S (AMS required); A1/A1 mini (AMS Lite required) 4. Common problems: Material switching failed? → Check if the connector is loose and the PTFE tube is worn. Is the material stuck or blocked? → Make sure the connector is aligned with the AMS and hot end to avoid bending. 5. Other machines: Not tested, please confirm that the machine supports multi-color material change function. Specifications: Due to different batches, there may be differences in product appearance, color, and printed text, which will not affect the use. Color: As Shown Material: Metal + PLA Package Contents: 1 x AMS Feed Pipe Connector 1 x 8M Feed Tube 1 x Tube Cutter