Only Support for 3Doodler Start + 3D Pen: This PCL Filament Refill Strand Pack Only Support For 3Doodler Start 3D Printing Pen; The Filament Diameter is around 2.5mm, It's Not Support For Any Other Brand 3D Pen, It's Only Support for 3Doodler Start 3D Pen Perfectly Safer and Healthier Material: This PCL Material is Low Printing Temperature, Which Much Safe and Environmental Friendly Material, It's Non-Toxic, No-Smell, Low Printing Temperature around 158°F (70°C), It's Far More Safer and Healthier for Kids, Children, Students and Adults Package: This Pack Include 25 Mixed Beautiful Bright Solid Colors: Great Suitable for 3Doodler Start+ 3D Pen to Do More Drawing Arts, Crafts, DIY, To Print Many Different Colors 3D Pen Printing Projects; Each Filament Length is Similar Like 3Doodler Start Filament, Also, it's Much More Bright Colors than Other Brand on Market High Premium Quality and Package: Our PCL Raw Material Are 100% Pure, All of Our PCL Filament are High Quality Controlled, Each Pc Length is 15cm Length, 25 Colors Included, Each Color 10pcs, Total 250pcs 3750cm PCL Filament Refill Packed Together Warranty: Within 24 hours Response, If Any Question, Pls Kindly Inform us at Any Time, We'll Always Here for You, This PCL Filament Pack Include More Colors Mixed, It's Great Gift Sample Pack for Your Kids and Friends Low Printing Temperature Pen, To Draw Much More Different Colors as You Like Product Description