UltraTech Gravel Bag, Roll form, Green, 11?Äù X 250 Yards, Continuous Roll 2 Pack 9784 Capacity 200 C fold or 275 multi fold towels Adapters Include: 55 64in Adapters Include: 55 64in 70 gallon sump contains a 55 gallon drum (not included) to hold washout until it can be disposed of properly Heavy Duty Bags Provide Quick and Easy Sediment and Erosion Control Gravel bags are a basic BMP (Best Management Practice) used to meet regulatory requirements for stormwater and erosion controlThe sizes are industry standard and allow the user to fill them up with as much or as little gravel as the application requiresDifferent sizes lend themselves to different applications