ABS Acrylonitrile Butadiene Styrene is a favorite filament among 3D printer users because it is light weight and durable. It can be injection molded which makes it perfect for 3D printing extruders. It has a high glass transition temperature to reduce deformation but it is also low enough to be safely attainable with standard 3D printers. ABS is a hard strong plastic with some flexibility when compared to PLA. It is also soluble in Acetone and it can be easily sanded and machined. Compatible with RepRap Makerbot UP! Lulzbot Afinia Solidoodle Maker Gear Ultimaker Printrbot LC and more! Extrusion Temperature: 230-245°C Filament Diameter: 1.75mm or 3mm (2.85mm actual) Diameter Tolerance: +/- 0.05mm Net Weight: 1 kilogram / 2.2 pounds Spool Size: 200 mm x 68 mm Spindle diameter: 56.5 mm