No one will ever know you goofed when you use Post-it Labeling and Cover-up Tape. It covers mistakes neatly, is easy to write on, and is virtually invisible on copies. 700-inch long roll is wide enough to cover six lines of standard-sized type.No one will ever know you goofed when you use Post-it Labeling and Cover up Tape. It covers mistakes neatly, is easy to write on, and is virtually invisible on copies.