3D Pen Filament Refills - 1.75mm ABS 852 Linear Feet | 32 Feet Each Color | Fun Pack of 26 Different Colors Includes 3 Identified Glow in the Dark By ATK3D (ABS) UNIVERSALLY COMPATIBLE - Fits most 3D Pen and 3D Printers equipped with 1.75mm diameter heat nozzle OVER 850 FEET COMBINED ABS FILAMENT LENGTH - The most linear feet available in a variety of exclusive colors in one pack. BONUS 3 GLOW IN THE DARK - Yellow - Green  Blue USER FRIENDLY - Color coded ties to identify Glow in the Dark Filament RESEALABLE HEAVY DUTY ZIPLOCK BAG - Filament lasts longer than non sealed packaging.