The MD1 Flex Copper3D filament is a 2.85mm diameter antibacterial TPU material in a grey-blue color. Produced by Copper3D, this unit contains 500g of high-quality filament for 3D printing. The open packaging ensures the filament is unused and ready for use in your 3D printer. This product is ideal for those looking for a unique and antimicrobial material for their printing projects.