17 Artificial resins in extruded form for use in manufacture; Artificial resins in the form of bars for use in manufacture; Artificial resins in the form of blocks for use in manufacture; Artificial resins, semi-processed; Plastic filaments for 3D printing; Semi-processed natural resins; Semi-worked ABS (acrylonitrile butadiene styrene) filaments for use in 3D printing; Semi-worked ABS filaments for use in 3D printing; Semi-worked PLA (polylactic acid) filaments for use in 3D printing; Semi-worked thermoplastic filaments used for 3D printing