MakerBot PLA Filament is the highest-quality PLA 3D printing material available for use with award-winning MakerBot 3D printers. Safe for the classroom office or home this material is non-toxic and easy to print with minimal warping or curling. It s also the best most consistent material to use with previous MakerBot Replicator+ 3D printer models. It was formulated specifically for MakerBot 3D printers and software to provide consistent reliable performance high dimensional accuracy and professional quality. It s a non-toxic bioplastic derived from corn that is certified biodegradable making its well as classroom office and desktop safe. One spool of material weights 2 lb 0.9kg has a diameter of 1.75 mm and a melting temperature of 302-320°F.