1 Each. Wall Expansion Set is designed for use in the Tarifold Wall Unit Organizer and Partition Wall Bracket Starter Set and includes 10 PVC pockets in assorted frame colors, mounting plate, index tabs, pluggers and hardware. Letter-size, pivoting pockets are designed for optimum visibility. They offer strong protection for your documents against dirt, spills and dust, even with intensive use. Wire-reinforced, display pockets are rigid but flexible enough to insert and remove documents easily. Vertical mounting allows quick eye-level reading.