... : 0.1 ~ 3.0 mmSpecificationsTungsten alloy Wire, Tungsten alloy wires Grade W1, W2.1, WAl1 ... ~ 99.98% ISO 9001:2001 Tungsten alloy Wire, Tungsten alloy wiresPurity 99.95% ~ 99.98% Diameter: ... of alloy steel, with tungsten carbide based hard alloy, and the strong heat resistant alloy alloy.Mainly ... durable alloys*Contactor material and high proportion alloy*Electric vacuum of tungsten lighting material* ...