Ping Ray Inc. (PRI) is the leading company of supplying electric heating cables. With the PTC materials developed by Industrial Technology Research Institute (ITRI-a national research organization of Taiwan) , our PTC materials have high coefficient to make PRI electric heating cables with much longer lifetime. Moreover, we are using the most advanced production and test equipment from the United States and Japan to develop and manufacture the conductive polymers, e-beam irradiation cross-linking polymers, self-regulating heat trace cables by ourselves. With superior product design, good quality control, and premium production management, we get the certificates of CE, KEMA, NENW, UL, ISO9000: 2000, ISO14001: 2004 to ensure our customers getting the most competitive products from PRI.