Folder Inserters < All FP Products Folder Inserters Save time by letting FP Folder Inserters do the work for you. FPi 600 Feed. Fold. Seal. There’s nothing our FPi 600 folder inserter machine does better! FPi 2300 The FPi 2300 folder inserter gives you the best solution for folding your business documents into C6, C6/5 and C5 envelopes. FPi 4700 The FPI 4700 folder inserter automatically organizes every document for perfect sequence and collation. FPi 5600 The FPI-5600 folder inserter makes tackling business mail a cinch. Easily feed, fold and insert documents into envelopes with the touch of a button. FPi 6600-2 The FPI 6600-2 folder inserter is our top-of-the-line product, assembling mailings with superior finish in no time.