Ketron® GF30 Polyetheretherketone PEEK is an extruded, 30% glass fiber reinforced grade with excellent dimensional stability and outstanding chemical, corrosion, and creep resistance. With the addition of glass fibers, Ketron® GF30 PEEK has a significantly low expansion rate and high flexural modulus. In addition to these characteristics, Ketron® GF30 PEEK is often favored for structural applications that require improved strength, stiffness, or stability, especially at temperatures above 300°F / 150°C.