A class of resins that can include PolyARylAmide (PARA) resins, Polyarylates, as well as PolyArylEtherKetone (PAEK) and other PolyEtherKeton compounds (PEK, PEEK, PEKK, PEEKK, and PEKEKK), which we categorize under PolyEthers. PolyAryls typically have high heat resistance and exhibit excellent properties in other categories, like dimensional stability and strength. Wikipedia Link