These are the short belts that connect the x and y motors to the axes.
Official Ultimaker Spare Parts for the following printers:
Not compatible with Ultimaker Original, or Original+.
2mm hex head screwdriver. Official Ultimaker spare part. Compatible with the following printers: Ultimaker 2+ Connect Ultimaker S5 Ultimaker S3 Ultimaker 3 Ultimaker 3 Extended Ultimaker 2+ Ultimaker 2 Extended+ Ultimaker Original+ Ultimaker 2 Go Ultimaker 2 Ultimaker 2 Extended...View full product details