1.We provide high quality and different size 2.The products are exported to countries all over the world kindly hope contact me by (shenglin05 at gmail dot com )thanks U-blacket steel size:6m~12mSpecification: 25U, 29U, 36U Material: 20MnK Anshan Shenglin Import & Export Trade Co., Ltd.Anshan Ketong Machinery Processing Co., Ltd.Ms Michelle