It's the same filament, just spooled differently.

Every year, we continue to iterate and develop our ECO spool technology to make 3D printing more reliable and ECO friendly.

Check the straps that secure each refill spool. Refill V1.0 features transparent, single-use plastic straps. Refill V2.0 features reusable, self-adhesive straps and a cardboard ring. Refill V3.0 features the same adhesive straps without the cardboard ring.

The most recent version that you can get your hands on.

All previous versions are compatible with our ECO spool.

Please leave your request in the comments section at checkout if you're looking for a particular version. We'll do our best to accommodate your request if we have any remaining stock. Otherwise, we'll send you the latest version.