Z-axis endstop limit switch, with short, black wire.
Official Ultimaker Spare Part for the following printers:
- Ultimaker 2+
- Ultimaker 2 Extended+
- Ultimaker 3
- Ultimaker 3 Extended
- Ultimaker 2
- Ultimaker 2 Extended
Note: NOT compatible with the S7, S5, S3, or Ultimaker 2+ Connect.