Hoppers are nodes that can transfer items to and from the inventories of adjacent nodes. The transfer direction depends on the orientation of the hopper.
The wide end of a hopper is its "input" end, if there is a compatible container (e.g. a chest), one item per second is taken into its own internal inventory. The hopper will also draw in dropped items.
The narrow end of the hopper is its "output" end. It can be either straight or 90° bent, relative to the input. It will attempt to inject items into a compatible container connected to it. On failure, the item is either held back in the hopper inventory or ejected, depending on its configuration.
#### Chute node
The "chute" node acts as a pipe for items injected by a hopper or sorter. Use a screwdriver tool to achieve the desired rotation.
#### Sorter node
Item stacks placed into the "filter" grid of the sorter node inventory define how to distribute the incoming items into the two outputs.
* Matching items are sent into the direction of the large arrow (`V`).
* Other items are sent to the 90° side output.
Special case: The "filter all" option will cause the sorter to attempt to send *all* items in the direction of the large arrow. On failure, they're sent in the direction of the smaller arrow. Use-cases:
* Protection against overflowing containers
* Protection against unaccepted items in the destination slot(s), such as the furnace fuel slot
#### Built-in mod compatibility
The following nodes are supported out-of-the-box. "above"/"below"/"side" describe the location of the hopper.
* Hopper texture size: 16x16 pixels (default) or 32x32 pixels
* Single craftable item: output is straight or rotated by 90° to the side based on how you place it (default). When disabled, straight and bent hoppers must be crafted separately.
* Eject items button: option to remove the "eject items" button from hoppers
