Minnesota-based company Fused 3D has just announced their new line of 3D pen printer strand filament. The filament, which is priced at around a third of what other companies have been charging comes in multiple colors including black, red, yellow, blue and green. The company is selling the material on Amazon for just $14.99 per 50 - 10-inch strands. More information of Fused 3D's latest material offering can be found here: http://3dprint.com/73236/fused-3d-pen-filament/
If you do decide to purchase this material for your 3D printing pen please provide a review in the replies section below.