specifications: baled aluminum used beverage can (ubc) scrap: minimum density of 22 pounds per cubic foot (353 kg/m3) flattened ubc. size: minimum 30 cubic feet (.85 m3), with bale range dimensions of 24" to 40" (61 to 132 cm) by 30" to 52" (76 to 132 cm) by 40" to 84"(102 to 213 cm). tying method shall be as follows: four to six 5/8" (1.6 cm) x .020" (5 mm) steel bands, or six to ten #13 gauge steel wires (aluminum bands or wires are acceptable in equivalent strength and number). use of skids and/or support sheets of any material is not acceptable. magnetically separated and free of steel, lead, bottle caps, plastic cans and other plastic, glass, wood, dirt, grease, trash, and other foreign substances. any and all aluminum items, other than used beverage cans, are removed.