Low Dross Solder Bar,Made of super pure tin and electrolysis lead, and using advanced smelting technology and strict QC testing, this highly reliable soldering bar produces shiny soldered dots. Moreover, there is lower dross produces than when using general solder bar, as the impurity content is considerably decreased. The solder bar had been authorized the patent,which patent number is:ZL03129619.x Melting point: 183 - 227oC Working temperature: 240 - 320oC Inner packing: 0.5kg/pc, 1.0kg/pc Outer packing: Carton dimensions: 0.34 x 0.19 x 0.07m N.W.: 25kg/carton.