This print file will produce four 24 inch wide Kenworth older style step boxes, and two 36" boxes. These are the rounded top type typically seen on the A model etc. You can remove the 'sprue' pins entirely, or cut them short to use as pins for additional strength when mounting to a frame. Should you have any problems printing these, feel free to contact me via shapeways 'contact seller' link, or direct to modelmechanic@gmail.com