hộp sắt đen 50x100

Thép hộp chữ nhật 50 x 100x1.2,50x100x1.3,50x100x1.4, 50x100x1.6, 50x100x1.8, 50x100x2.0, 50x100x2.3, 50x100x2.5, 50x100x2.8, 50x100x3.0, 50x100x3.2, 50x100x3.5, 50x100x3.8, 50x100x4.0, 50x100x4.2, 50x100x4.5, 50x100x5.0, 50x100x6.0, 50x100x8.0 Mác thép: ss400, S50C, SM490,420, SKD11, Q345...