Graphene 3D Lab Inc. announced that it has expanded its product line. One of the company's feature products "Conductive Graphene Filament", a Conductive PLA 3D printing filament, will now be available in the 3 mm diameter on the company's on-line stores. The company is adding this product to meet multiple requests from its customers using 3D Printers from a variety of manufacturers such as Lulzbot, Ultimaker, and many others with this filament standard.