Amerimax 5651500120 Z-Bar Flashing 10 ft L 5/8 in W Galvanized Steel - Pack of 50

Used to create a water barrier between the top piece of wood siding and the bottom piece. With an exterior wall being over 8 ft tall, used where 2 pieces butt together, keeping the water from running down the top sheet, between the joint and behind the bottom sheet. 10 ft length.