Erosion Control 2 String Bales In Bundles are perfect for controlling silt and runoff on construction sites. Bales from weed free material these bales are tough and can withstand months of exposure to the weather. The tough straw material that they are baled from make the perfect silt filter allowing water to pass through and holding silt back. The size of these bales is 14“x 18” x 34”L. They come either loose or packaged in bundles of 21 for ez forklift handling around the jobsite. Please note these bales are intended for steaking as retention barriers and not for spreading as a mulch. For mulching straw refer to our product# 5000-3.