AUTOMATIC BOX-STACKER: available only for PAL-108D Composed of: Chain conveyor for boxes in-feed. Pneumatic device for adjustment according to the box’s size. Pneumatic device for up/down-bringing of boxes Electric cabinet equipped with display to facilitate the regulation of the machine. Pneumatically controlled box-stopping flap with manual regulation for box-sizes. Box sizes for both crosswise and lengthwise in-feed. Box 30x40, Box 30x50, Box 40x60.