Grocery Bag: Bales must contain at least 70% HDPE grocery bags Other Polyethylene: Less than 30% LDPE bags and shrink film Bale Specifications Dimension: Not to exceed 3â?? x 4â?? x 6â?? Bale Weight: Not to exceed 1400 lbs. Density: Bale density should equal or exceed 20 lbs. Per ft.3 Strapping: Galvanized wire or polypropylene Integrity: Must maintain contents through shipping/handling Markings: Each bale must be clearly marked with supplier name, D.C. #, A.E.R.T. PO#, and bale weight.