... good service:lifelong after-sales service 1.About our productsName C purlinDimensionsLengthCbeam: According to the engineering designHeight80,100,120,140, ... &wallPVC or aluminum alloy doorDoorSliding or rolling doorInsulation panelEPS,XPS,Rock wool , PU sandwichMaterialQ235B,Q345B China standard steelSheet0.5mm or 0 ... for more information! Look forward to cooperating with you ! C purlin