Baled aluminum used beverage can ubc scrap shall have a minimum density of 14 pounds percubicfoot 225kg/m3, And a maximum density of 17 pounds per cubic foot 273kg/m3 for unflattened ubc and 22 pounds per cubic foot 353kg/m3 for flattened ubc. Size minimum 30 cubic feet . 85m3, With bale range dimensions of 24 to 40 61to132cm by 30 to 52 76to132cm by 40 to 84 102to213cm . The only acceptable tying method shall be as follows four to six 5/8 1. 6cm x . 020 5mm or six, Steel bands 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 materials not acceptable. Must be magnetically separated material and free of steel, Lead, Plastic cans, Bottle caps as well as various plastics, Glass, Wood, Dirt, Grease, Trash and other foreign substances. Any free lead is basis for rejection. Any and all other than, Aluminum items used beverage cans, Are not acceptable. Variations to this specification should be agreed upon prior to shipment between the buyer and seller.