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Description:Specifications: 1). Grade: W1, W2, WAL1, WAL2 2). Diameter Size: 0.012 to 1.8mm 3). Type: black, white 4). Purity: W1, W2 ---W over 99.95% WAL1, WAL2---W over 99.92% Applications: 1) For light industry as electric light source parts and electric vacuum components 2) For heating elements and refractory parts in high temperature furnaces 3) For heating elements in vacuum metalizing or plating