Unfortunately, a 9-link item in Path of Exile is currently impossible. The maximum number of sockets you can connect on any piece of equipment is 6, which requires several intricate crafting methods. It’s possible you might be confusing it with something else, like:
9-Link Build: This refers to a specific build configuration where you achieve the effect of 9 skill gems linked together through various techniques like utilizing a "Blood Magic" support gem, which allows casting without mana, freeing up a gem slot, or using a unique chest armor called "Victario’s Influence" that grants an additional link for its specific skill.
Mirror Tier Item: These are extremely rare and powerful items with the highest possible combination of modifiers. Although these items technically only have 6 linked sockets, their exceptional stats might make them feel comparable to a hypothetical 9-link.
Custom Leagues: In Path of Exile’s private leagues, creators can modify various game mechanics, potentially including creating items with more than 6 linked sockets. However, these leagues are not part of the official game and their rules vary greatly.
If you could clarify what you meant by "poe 9 link," I might be able to provide more relevant information or resources!