17 Plastic filaments for 3D printing; Semi-worked ABS filaments for use in 3D printing; Semi-worked PLA filaments for use in 3D printing; Semi-worked thermoplastic filaments used for 3D printing; thermoplastic filaments infused with ceramic powder for 3D printing; thermoplastic filaments infused with metal powder for use in 3D printing; and filaments made of glass fiber, carbon fiber, or aramid fiber for 3D printing