The true white 1.75 millimeter ABS Filament from MakerBot is designed to work with the MakerBot Replicator 2X Experimental 3D Printer, MakerBot Replicator 1 3D Printer, and MakerBot Thing-O-Matic MK6+ Desktop 3D Printer. This filament requires a heated build platform, and prior to printing, please ensure the build plate is level, clean, and oil-free. MakerBot ABS filament needs to be used in a well-ventilated area and has a glass temperature of 221 degree Fahrenheit, an amorphous (no "true") melting point, a nozzle temperature of 446 degree Fahrenheit, and a diameter of 1.75 millimeter. MP01970