... box is made from sandwich panel with EPS foam in core.Model A: pre-painted steel sheet as ... cover, plywood as inside cover, with EPS foam in core. Common panel thickness 30mm,40mm,Model C: ... sheet as inside and outside cover, with EPS foam in core. Common thickness 30mm,40mm,Model D: Aluminum ... cover, plywood as inside cover, with EPS foam in core.Common panel thickness 30mm,40mm,Our refrigerated truck ...