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What is wood packaging material?

Wood packaging material or WPM is also called Non-Manufactured Wood Packing (NMWP) or Solid Wood Packing Material (SWPM). It is defined as hardwood and softwood packaging other than that comprised wholly of wood-based products such as plywood, particle board, oriented strand board, veneer, wood wool, etc., which has been created using glue, heat, and pressure or a combination thereof used in supporting, protecting, or carrying a commodity (includes dunnage).

Examples of WPM include pallets, skids, pallet collars, containers, cratings/crates, boxes, cases, bins, reels, drums, load boards, or dunnage. Wood packaging made of exempt materials but combined with solid wood components must still be treated and marked.