According to customer’s projects, sizes of corex and dunnage boxes are defined specially. Also, used PP thickness is defined within the project. Besides that, there are different color and thickness PP corrugated board options. It can be produced with separator or empty. Separators can be produced from PP corrugated board, Eva, Sponge, Foam, Fabric with different shapes. According to project, lot numbers of separators are determined specially. They are also known as returnable boxes, returnable packaging box, and PP corrugated box.