The Formax FD 6404 Series Paper Folder & Inserter saves time and money. The versatile 6404 Series adapts to most any folding and inserting application. Models are available with 2 6 stations, offering the flexibility to meet your specific needs. A variety of input configurations include a high-capacity document feeder for up to 725 sheets, 1 or 2 high-capacity production feeders, standard and special feeders, and short feed trays. The 6404 Series is capable of folding and inserting top, middle and bottom-address documents into top-flap envelopes.