This is the Great Planes 4" Wide Heavy Weave Fiberglass.
Great for adding strength to surfaces
90° cross weaves with white coloring
Consistent weaves for smoother finishes
One Heavy weight strip (4 inch(102mm) by 5 feet(1528mm))
One Instructions (part of the package header card )
Sand and clean surface, Epoxy Glue for porous
materials like wood or CA glue for plastics,
cut to size and filler.