Replacement tool head PCB. This is the board behind the the extruder under the plastic cover. Compatible Models: for K2, , K2 Plus High-Quality Material: Manufactured with premium materials for durability and efficient performance. Easy Installation: User-friendly design allows for quick and easy installation, your printer back up and running in no time. Original Replacement: replacement part, guaranteeing compatibility and performance. Color: Black Material: PCB+Plastic Package Contents: 1*Toolhead Board 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.