Synthetic resins, semi-processed; Plastic substances, semi-processed; Plastic filaments for 3D printing; Semi-worked PLA filaments for use in 3D printing; Semi-worked ABS filaments for use in 3D printing; Acrylic resins, semi-processed; Artificial resins, semi-processed; Carbon fibres, other than for textile use; Plastic fibres, other than for textile use; Threads of plastic materials, other than for textile use