The product is a set of 8
reusable empty old style Sunlu 3D printing filament spools designed for 1.75mm/1kg. These black spools are perfect for storing and organizing your 3D printing filament.

We run a small print farm and looking to repurpose the empty spools.

works great for selvedging trashed cardboard spools due to poor shippers. Just knock the cardboard off the side and put center on the breakaway sunlu spools.