Monarch 3D Warehouse is NOW selling Experimenter's Kits. This is a great way to try our filaments before buying an entire spool. These Experimenter's Kit provides 20 feet (6.1 meters) of each filament. Experimenter's Kits Come in Three options. Available filaments include NinjaFlex - Water (natural) , Taulman t-glase - Red, Proto-Pasta Carbon Fiber, 3DomUSA Ingeo PLA - Ocean Blue and Functionalize F-Electric. 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.