These milled fibers are made from Advantex® glass and are cut to 1/4 inch. Milled fibers add strength and dimensional stability. It also increases impact resistance and surface hardness. Milled fibers can be added to polyester, vinyl ester and epoxy resins. It has been engineered as reinforcement for foamed polyurethane, thermoplastics and thermosets and may be used under all normal conditions.