[4 in 1] SUNSHINE Relife Soldering Iron Tip Head 900M Series1. Make use of imported copper oxide, use special molding machine to process, the tip size very precise; 2. Lead free alloy iron electric plating close grained, very long life about 3 4 times compared to domestic products; 3. Product surface use special material handling, tip end with coating processing, so as to ensure the tip not turn black under the high temperature; 4. Good performance in tin on and tin melting, solder joints uniform, and fluent