ITEM NAME:10pcs Constant-temperature Common Solder Soldering Iron Tip For 900M 963 Stat â„–[.Material: copper + iron. Note:Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. Type: 900 m-T-2.4D/ 2C/ I/ 1.2d/ 3C/ 4C/ K / 3,2D/ B/ I (12J).