Compatible with 3Doodler Create+/create/2.0/V1 3D Printing pen. Conforms to the health requirements of ASTM-D-4236 and require no additional labeling in accordance with the US consumer product safety Commission’s regulations as mandated by labeling of hazardous art materials act (LHAMA). Flexy is 3Doodler very own Type of plastic that takes creativity to new levels. Squeeze, STRETCH, & TWIST your 3D creations, providing a truly dynamic Doodling experience. Every strand of plastic the 3Doodler create Plastic creates 10 inches of doodle.