Goldmine specilized in high quality PLA and ABS filament with abundant colors. This filament is always round, with no oily residue, no air bubblesThe plastic is top quality It is not easy to curly and fracture.Best choice for perfect printing! Features: * For common 3D printers such as RepRap,Makerbot,Mendel,Huxley UP,Printer,WeisTek,Thing-o-matic,Ult * This Goldmine filament holds exceptionally tight tolerances. * Widely used in health care, education, toys, building, automobile, electronics, and anime field. Tips: 1.Is your filament tangled? Check that the spool is spinning smoothly on the mount. 2.Is the nozzle clogged? Run the Load script from the onboard menus. Observe the plastic as itemerges from the nozzle. 3.Does it drop straight down, or curl up toward the extruder? If it curls back up toward the extruder, the nozzle may be partially clogged. 4. When having trouble getting the first layer to stick well? Some adjustments to the nozzle calibration height