3D printer filament with 1.75 mm diameter + / - .05 mm; designed to fit most common 3D printers (check spool size for compatibility); ideal for printing small parts, phone cases, watch bands and more; Set of 5 assorted colours; 1 kg spools Made of strong yet flexible thermoplastic polyurethane (TPU), which is easy to use and offers excellent layer-to-layer bonding; resists oil, grease and scratches; holds up well to more rigorous wear and tear Spool’s built-in gauge shows percentage of material remaining and approximate length remaining Engineered to reduce jamming; resealable storage bag included to protect filament between use Measures 24.8 by 23.6 by 40.8 cm (LxWxH); weighs 0.9 kg Vacuum-sealed packaging in desiccant bag to keep product fresh, dry and dust-free for optimal 3D printing results