... rod, made of PLA, it's a eco-friendly and poisonousless products. Safe for printing, food contact, skin contact. ... 1. Filaments produced by biobased environmental materials PLA ,PVA and engineer plastic ABS , PLA is renewable, biodegradable materials;2 ... supplier, strictly quality control, dimensional accuracy ±0.05mm with laser monitor and interlock device, smooth surface, no bumps, independent R&D ...