Alignment Bar (Ab) Alignment bar(s) provide edge control, acting as a lay edge for stack alignment under aeration. The bar is manually adjustable to a range of pile heights and widths. A second alignment bar can be added to maintain edge control for lighter papers. The alignment bar can also be used for stacking piles. Restrainer Bar (Rb) The restrainer bar is laid on the top edge of the stack to avoid and control excess sheet lifting during aeration. It is fully adjustable to the pile height. Support Bar (Sb) Support bars extend the aeration board and support lighter papers during aeration. Dividing Bars (Db) Dividing bars enable splitting of twin stacks from a single pallet to separate feed boards or pallets.   All accessories can be purchased and fitted later.