Material: 1): Face: Magnetic steel board 2): Frame: High strength aluminum alloy 3): Corner: High strength engineer plastic. ummarize:1): Face: Magnetic steel board2): Frame: High strength aluminum alloy3): Corner: High strength engineer plastic.4): Dimensions: 120 x 400 cm, 120 x 360 cm, 120 x 300 cm, 120 x240 cm; other specifications available upon request5): Most important: We manufacturing ...