the life of our molds could used over thousands times, we use the material is polyurethane. Compare to traditional rubber cold isostatic pressing bags, the polyurethane CIP bags have significant advantages. as a new polymer material, polyurethane products feature smooth surface, wearing-resistant, anti-fatigue, low deformation rate. the surface of pressed products with polyurethane bags is much smoother than that pressed with rubber bags, thus it possesses better looks and less post processing is required. It'S an ideal tool for powder material forming by press process, which can help a company reduce cost and increase efficiency.