3D Pen PLA Filament I am selling this because it didn't fit the 3D pen my child has. I used a little bit of the red filament... 24 Colors 3D Pen PLA Filament Refills 1.75mm Premium Filament 10 feet per color for 3D printers/3D pens. This is what was written on the website where I purchased it. It will be delivered in an envelope or a plastic bag. I am not considering lowering the price or selling individual colors.