About Ultem 2300|Glass-fiber reinforced Ultem (PEI with 30% glass fiber). Dramatically higher strength and stiffness than unfilled
Ultem 1000, with better dimensional stability and heat deflection temperature. Machines with carbide due to glass fiber abrasiveness. Used for structural aerospace components, electronic housings, and high-performance connectors. Compare to Ultem 1000 (unreinforced, easier to machine) and
PEEK GF30 (glass-filled PEEK, higher temperature capability).