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.