surface material : high quality lacquered steel sheet in 0.20mm to 0.40mm thickness.The hardness is up to 5H.The colors can be pure white, green and black. white or green with grid line.
BACK:Made of galvanized steel sheet in 0.17-0.22mm thick. anti-rust and nice appearance.
FRAME: aluminum.
CORE:7 layer corrugated paper( most factory use 5 layer)
MARKER TRAY:Movable and made of aluminum.
GLUE:Environment-friendly.
HOOK:Mobile.Traditional triangle hanger.