The Dense Itemduct is a block from Thermal Dynamics used to transport items. It is a variant of the Itemduct, used to alter item transport logic. Items that enter Itemduct attempt to take the shortest path to the nearest valid inventory they can enter. Dense Itemducts are treated as being 1000 blocks long for this logic. As such, any path that contains a Dense Itemduct will be among the last valid paths an item considers when it enters an Itemduct, and will ignore any path containing a Dense Itemduct until all other paths are invalid. This is useful for creating an overflow storage area. Note that while pathfinding logic treats a Dense Itemduct as being 1000 blocks long, items do not take additional time to travel through them.
Dense Itemducts can be crafted from standard, Impulse, and Warp Itemducts. They cannot be crafted from Fluctuating Itemducts.