PEEK Filament is one of the highest performance materials on the market.  Exceptional mechanical, thermal, and chemical resistance properties make this an ideal material for the most demanding applications.  PEEK is inherently flame retardant with a UL V0 rating based on it's chemical structure and requires no additional additives to achieve this flame rating.  

Print PEEK with Gearbox™ HT2 High-Temp 3D Printer.  Check it out HERE.