... truck Box Our dry freight box is made from sandwich panel with EPS foam in core.Model A: ... outside cover, galvanized steel sheet as inside cover, with EPS in core. Common panel thickness 30mm, 40mm ... sheet as outside cover, plywood as inside cover, with EPS foam in core. Common panel thickness 30mm, ... ,40mm,Our refrigerated truck box is made from fiberglass sandwich panel with PU form in core.Model F: ...