FP FPi-600 Folder Inserter: While other tasks keep you busy, pile of letters and invoices waiting to be mailed keeps pilling up. Feed, fold, insert and seal them in no time with FPi-600 tabletop inserting system. Ideal for small offices, FPi-600 processes 1,350 letters per hour.central control panel with a color touchscreen is intuitively simple to understand and use. With 15 programmable jobs, FPi-600 provides instant recall of most frequently used folding and inserting tasks.