A herringbone mesh pattern with seven deep longitudinal solid steel ribs with 3-3/16" wide strips of plain 50Lbs. kraft paper spot attached with glue between ribs. Spray Rib Lath provides the superior strength and exceptional rigidity of regular 3.4 high rib lath while the addition of the strips of kraft paper limits the loss of plaster when used over open framing or when spray applied. Spray Rib lath is not a replacement for Grade-D weather resistant barrier.