Product description: Quantity: 7 pieces Material: Oxygen-free copper Color: Black Outer diameter: 6.5 mm Internal diameter: 4 mm Length: 4.2 cm Package includes 1 * 900M-T-K 1 * 900M-T-B 1 * 900M -T-2C 1 * 900M-T-3C 1 * 900M-T-I 1 * 900M-T-IS 1*900M-T-2.4D Durable material: The inside of the soldering iron tip is made of oxygen-free copper, with special alloy plating in the middle to protect the copper core, and the black chrome plating on the outside can prevent corrosion and residue. tin. Can be used for a long time. Seven specifications: There are seven common specifications: K, B, 2C, 3C, I, IS, 2.4D. Suitable for 900M series soldering irons to meet your needs in different working scenarios and work more efficiently. Safety Guarantee: The soldering iron tip does not contain lead. Not only is it harmless to the human body, but it also has no adverse effects on the ecosystem. It is safe to use. Easy to use: Heat up quickly with copper base, good tin hanging ability, not easy to oxidize. Suitable for 936, 937, 938, 969, 900M, 8586, 852D soldering iron stations.