BALERS/COMPACTORS Low density corrugated cardboard is a bulky material that needs baling or compaction to yield best value. Balers range in size from portable units the size of a kitchen refrigerator, up to automated balers weighing 50 tons used in high volume paper or solid waste applications. Compactors pack corrugated into enclosed outside containers, and are popular when space is at a premium and economical hauls are available to nearby baling operations.