These are official spare parts compatible with the UltiMaker S3.
Filament Guide Assembly (UM3/UM3X/S5/S3/S7)
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This is the filament guide assembly that sits on the back of the reel holder to prevent filament from tangling. This is compatible with the following printers: Ultimaker 3 Ultimaker 3 Extended Ultimaker S5 Ultimaker S3 Ultimaker S7
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