These 3mm PLA filaments are specifically designed for FDM printers such as the Creatbot and Mankati, Ultimaker, Printrbot.
These are high quality printer filaments with good dimensional accuracy 3.00mm +/_0.10mm.
PLA (polylactic acid) is a an natural bio-degradable polymer derived from either corn, maize or potato starch. It has no odor a low melting point (175 - 200 degrees C) which makes it less susceptible to warping during the printing process.
PLA can be used to produce case metal parts. The PLA can be used as a direct replacement for Wax in the lost wax process, as it will evaporate away during burn out. You can see a step by step example of Lost PLA casting here-