Strong, versatile, nylon polyamide six filament provides high inter-layer adhesion for your 3D printing projects. Sensitive to moisture but known for durability, minimal shrinkage, and resistance to a vast range of chemicals, this filament is great for models that require movement and for heavy-duty parts ranging from living hinges to interlocking gear mechanisms. Filament is on a 1 kg spool. 1 kg Spool. Device Types: 3D Printers; Color(s): Black; 3D Printer Filament Diameter: 1.75 mm; Supply Type: 3D Printing Filament.