The Impulse Itemduct is a block from Thermal Dynamics used to transport items. It is an upgrade to the Itemduct. Items can be pushed into it by machines or pulled into it by a Servo. Items that enter it will attempt to take the shortest path to the nearest valid inventory they can enter. Items travelling through an Impulse Itemduct move much more quickly than they would in a standard Itemduct.
There are two types of Impulse Itemducts: normal and Opaque. Opaque Impulse Itemducts are cheaper and do not render items that pass through them; non-Opaque Impulse Itemducts render items that pass through them. This can cause more graphical lag, but can also be more aesthetically pleasing or satisfying to watch.
Opaque and transparent Impulse Itemducts can be converted into each other.