BKK high Carbon steel Fishing Hooks Round Tungsten Jig Head is made of tungsten, nickel, and Iron, and the hooks are made of high carbon steel. This type of tungsten jig head with sizes ranging from 1.8g to 28g, the form below will show the details of the sizes. For those regular sizes, we have them in stock. If you need other sizes, we can also customize them for you. you can contact us at +86 18673339477 or sales@ejtungsten.com to offer detail.