1. Main function: This connector is a key component of multi-material printing (MMU, Multi-Material Unit), used to connect (automatic material switching system) and printer hot end to achieve automatic switching of 4 different colors/materials. 2. Specific function: merge 4 PTFE tubes (from ) into 1, so that 4 materials can enter hot end through same path. 3. Applicable models: For X1/X1C ( required); For P1P/P1S ( required); For A1/A1 mini ( Lite required) 4. Common problems: Material switching failure? → Check if joint is loose and if PTFE tube is worn.Material stuck or blocked? → Make sure joint is aligned with and hot end to avoid bending. 5. Other machines: Not tested, please confirm that machine supports multi-color material switching function Notes on use [Important]: When using, insert tube, and rotate it to that tube is inserted in place, so that material can be fed smoothly. The hygrometer is a mechanical model, does not contain button batteries, and is a common product. The four-way assembly is used to switch consumables during multi-color or multi-consumable printing. One end of four-way assembly is connected to 4 different tubes (up to 4 consumables), and other end is connected to top of extruder for feeding. The role of (4-in-1 PTFE connector) (for X1/P1/A1 series + ) Due to different batches, there may be differences in product appearance, color, and printed text, which not affect use. Color: White Material: PLA Package Contents: 1 x Four-Way Module 1 x 8M White Feed Tube 1 x Black Tube Cutter Only above package content, other products are not included. Note: Light reflection and different displays may cause color of item in picture a little different from real thing. The measurement allowed error is +/- 1-3cm.