Pulse Piston

The Pulse Piston is a block added by Factory Tech. It will push any item entities in front of it a distance of one block. Right-clicking one opens a GUI in which set a filter can be set to specify which items should be pushed; if the filter is empty, it will push everything. This can be used to separate out items from a larger stream, such as from a mob farm. It can be disabled by applying a Redstone signal.