Expansion Alloy, Feni50, Vacovit 500 manufacturer / supplier in China, offering 4j50 (Expansion-alloy) 50h, N50, Vacovit 500, Feni50, 0cr21al4 Wire Swg16 Fecral Alloy for Heating Wire, N6, N4, Pure Nickel, Nickel 201 and so on.