H-80, H60 Divinycell plain is rigid PVC foam with a closed, inert gas filled cellular structure. The 80 refers to Kilograms per cubic meter. Use 80 for walking decks and floors, 60 for everything else. These sheets are available in 2'x4' pieces which can be easily shipped. You may order as 4'x8' sheets that will need to be shipped by truck freight or will call.