3003-H14 Aluminum Sheet .025" x 12" x 12",3003-H14 Aluminum Sheet .025" x 12" x 12", The addition of manganese increases the strength and 3003 is 20% stronger than 1100,3003 is the most widely used aluminum alloy due to it's excellent characteristics including resistance to corrosion, ease of welding, forming and ability to obtain a highly polished surface finish, Fast worldwide shipping Click now to browse A daily low price store Do our best to make your shopping happy. 12" 3003-H14 Aluminum Sheet .025" x 12" x.