Overture Pla Filament 1.75Mm Pla 3D Printer Filament, 1Kg Cardboard, Pack). ?Clog-Free Bubble-Free?-- Designed and manufactured with clog-free patent to guarantee a smooth and stable printing experience with these PLA refills. Complete drying for 24 hours before packaging and vacuum sealed with desiccants in a transparent bag ?Less-tangle and Easy to Use?Full mechanical winding and strict manual examination, to make sure the line tidy and less-tangle, so as to avoid possible snap and line breaking; Larger spool inner diameter design makes feeding smoother ?Dimensional Accuracy Consistency?advanced CCD diameter measuring and self-adaptive control system in the manufacturing guarantee these PLA filaments of 1.75 mm diameter, Accuracy +/- 0.03 mm; 1 kg spool (2.2lbs) ?Cost-effective and Wide Compatibility?With over 8 years'3D filaments R D experience, thousands tons of filaments output every month, Overture is capable of manufacturing all kinds of filaments in large scale with premium quality, which contribute to Overture filament cost-effective and reliable for most common 3D printers, such as MK3, Ender 3, Monoprice FlashForge and more ?LIFE-TIME GUARANTEE?No matter when or why you need to replace or refund we will help! No risk to give us a chance to prove us, overture, are your reliable 3d filaments /accessories/3d printer/3d pen supplier