Key specifications Flexible 3d printer filament available 1.75�and 3.0mm Diameter tolerance: 0.05mm Available 40 colors, customized color Certifications: rohs directive-compliant, sgs, ce Inner pack: 1 spool/vacuum pack with desiccant/inner box Outer packing: 8 boxes/master carton Applications: makerbot, up, cuify, leapfrog, creatr, builder, reprap, felix, ultimaker and other fdm 3d printer, 3d pen Special features Recommended working temperature: 200 to 220 c High transparency Nontoxic, eco-friendly High flexibility and resilience No heat bed required, soft but great bonding between layers Smooth printing without adding any supporting, works better with pla