This is a great way to try our filaments before buying an entire spool. This Experimenter's kit provides 20 feet (6.1 meters) of Functionalize F-Electric. This Specialty filament is being offered by itself for Printer Enthusiasts that have been waiting to try just this filament. Each Filament comes individually vacuum sealed with a dessicant packet. Recommended Printer Settings are on the attached label. See Tech Info Section for more information about each Filament. 3 mm Coils weigh approximately 2.7 times more than 1.75 mm. FREE SHIPPING. Select "Free Shipping Experimenter's Kit Purchased Separately - U.S. Only" Option at Check Out.