Brazilian WBP BB/CC 2440mm x 1220mm x 5.5mm
Plywood is made by gluing together a number of thin veneers or plies of softwood or hardwood.
WBP - Weather and Boil Proof. This is exterior grade plywood and can be used outside. Water-resistant adhesives are used and can resist a certain amount of moisture. It requires paint or varnish to protect the outer veneer from the elements.