Multi-Color 3D Filament Extruder Rainbow 3D Filament Extruder. Automatic Production Line: Complete line with PLC control, automatic winding, and closed-loop feedback system. Rainbow Color Capability: Multi-color 3D filament extruder designed for producing rainbow colored filaments. Customizable Specifications: Screw diameter, L/D ratio, and raw materials (PLA, ASA, PETG, Nylon) are customizable. High Precision Control: Equipped with Siemens PLC, diameter automatic feedback, and laser caliper for accuracy. 1 Year Warranty: Comprehensive 1-year warranty coverage for the granulating extruder machine. Fast Response Time: Quick reply within 12 hours and manufacturing finished within 30 days. Quality Assurance: 100% inspection before delivery with 6-part checks and wooden case packaging. Global Export Experience: Exported to USA, Germany, Russia, Spain, and other countries with good feedback.