The 3D Printlife spool is a green alternative to the common industry standard plastic spool. All of our filaments are wound onto a heavy recycled cardboard spool that is biodegradable and bound with a recyclable tin end cap. The spool includes both a cut-out for viewing filament and dual puncture slots to secure filament when not in use. The flange can even rotate to in either direction to aid in securing the filament wherever it has been cut. Every spool also comes with a resealable bag and desiccant to help extend the life of the filament once opened.