Carbon Fiber Filled—Carbon-fiber-filled polycarbonate filaments make rigid parts that are difficult to bend and break. Parts made from these filaments can also be threaded and machined more easily than parts made from polycarbonate filaments without a filler. Carbon-fiber-filled filaments are abrasive, so you should use them with an abrasion-resistant nozzle.

Fiberglass Filled—Fiberglass-filled polycarbonate filaments make parts that are less likely to warp or shrink than parts made from polycarbonate filaments without a filler. Fiberglass-filled filaments are abrasive, so you should use them with an abrasion-resistant nozzle.

Static Dissipative—Static-dissipative filaments make parts that protect equipment from electrostatic shocks by diverting electrostatic discharges in a controlled way. Use them to create tool handles, tote trays, enclosures, and other parts that are used near sensitive electronics. To adjust the surface resistivity of your printed part, change the temperature of your printer’s extruder. As the extruder’s temperature increases, the printed part’s resistivity will decrease.

UL 94 V-0—UL 94 V-0 rated filaments meet strict flammability standards. Use them to create holders, guards, housings, and other parts that protect sensitive, flammable equipment and machinery.

Tensile Strength—Tensile strength is the best measure of a filament's overall strength. Similar to the stress applied on a rope during a game of tug-of-war, it's the amount of pulling force a material can handle before breaking. A higher rating means a stronger filament. A tensile strength of 5,000 psi and above is considered good; 12,000 psi and above is excellent.