3Doodler AB05 ABS Plastic Filament Strands, 25 Strands, Sunnyside Yellow Perfect for doodling from stencils: perfect for if you want to doodle creations that require a sturdier base, such as the Eiffel tower. ABS plastics spiral and draw upwards off the page with ease. Recycle-friendly: ABS is a petroleum-based Type of plastic and can be recycled in class under recycling number 7 Compatible with 3Doodler v.1, 2.0 and create 3D printing pens Available in single & mixed color packs containing 25 strands, and single color tubes containing 100 strands.