Heavyweight front and back with hidden poly reinforcement strip to improve strength. 6 1/2" high gussets reinforced at top with rollover Tyvek? strip. Back of pocket lined with Manila for added strength and easy identification of subject heading. Fold-down front. Straight cut tabs. Expandable File Folder Type: Drop Front; Top Tab Pocket; Size: Letter; Width: N/A; Height: N/A.