Plated with lead-free solder. Lead-free alloy iron electric plating close-grained.The tip size very precise. Good performance in tin-on and tin melting. Solder joints uniform and fluent soldering. High anti-oxidation good moist performance quick thermal conductivity. High strength and hardness. Durable in use. For heavy series soldering irons. Length: approx. 15mm Material:metal Color:silver Package Contents: 1 * T12-K soldering iron tip 1 * T12-KU soldering iron tip 1 * T12-KF soldering iron tip Note: Light and different displays may cause the color of the item in the picture a little be different from the real one. The allowable measurement error is +/- 1-3 cm.