Maximize workplace productivity by placing important information at your fingertips with the Tarifold desktop organizer, Complete with desk base, universal mounting bracket, color-coded wire reinforced display pockets (each holder holds 2 sheets), and a pair of side stops (which support the pockets), Snap-on index tabs and hardware included, D291 can be expanded to 20 or 30 pockets by adding additional W291 units, B Size unit W291B holds blueprints up to 12, 75 x 18, 5, SKU: TRFD004