loading and unloading components are specifically designed to support printing of multiple colors and materials. Each has 4 first stage feeders, each with its own motor and gear to actively push forward or retract consumables. The first stage feeder has a sensor for detecting consumables. When inserting consumables, the first level feeder automatically pull the consumables; When it is necessary to roll back the consumables, the first level feeder drive the drive sleeve to rotate the reel to roll the consumables. In order to optimize product performance, we have upgraded the circuit board of the loading and unloading components. This upgrade have an impact on that used the earliest motherboards. Before purchasing the Hall version loading and unloading components or feeding port components, please visit the official to confirm the version of the motherboard. Color:As Shown Material:plastic Package Contents: 1 * Printer Accessories Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.