This 3mm PLA filaments are specifically designed for FDM 3D printers such as 3DStuffmaker, 3D Touch, AirWolf 3D, Aluminats, Bukobot, Lulzbot, Printrbot, Replicator 2X, Tantillus, Ultimaker, Repman.
These are high quality printer filaments with good dimmensional accuracy 3.00 +/_0.10mm.
PLA (polylactic acid) is a an natural bio-degradable polymer derived from either corn, maize or potato stach. It has no odor a low melting point (175 - 200 degrees C) which makes it less susseptable 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-