Tarifold, Inc. W290 Wall Unit Reference Starter Set with Five Display Pockets, 10 Sheet Capacity Tarifold, Inc. Wall Unit Reference Starter Set with Display Pockets. Color-coded display pockets hold letter size sheets; two viewing sides per pivoting pocket. Expandable by mounting units side by side. Color-coded display pockets hold letter size sheets; two viewing sides per pivoting pocket. Expandable by mounting units side by side. Mount on desk base of Desktop Starter Set.