1kg 1.75mm Monoprice PLA+ 3D Printer Filament (Black): 5 for $49.40

PLA Plus+ is a good choice for a printing material if you are looking for high accuracy and high resolution. It does not require a heated base and has a very low shrinkage rate (0.3%). PLA Plus+ is stronger than ordinary PLA, possessing the same strength as normal ABS material.
This 1.0kg spool features a thickness of 1.75mm ±0.10mm, with a roundness variation of only 0.03mm. It has a nominal processing temperature range of 205 ~ 225°C (401 ~ 437°F).