The parallel folding unit is necesssary for folding of thick products, when the folding pocket is at its limit. The folding knife pushes the product between the folding rollers for the folding process. Especially for pharma applications (Outserts) this unit will be needed. The product becomes very thick, if it is folded many times. In the XP 250.1 gluing heads are installable. This allows a closing of the products. An alternative is a guiding into an additonally labeling system, so that the products can be closed by a tab or label.