cold room door: 1.structure simple 2.reasonable selection 3.beautiful appearance 4 ... 40PU thickness: 50mm,75mm,100mm,120mm,150mm,200mm quality: highSliding door internal polyurethane foam overall.Application industry:Food, industrial, supermarket, ... can separate door and doorframe.And when close the door , the wheel can press doorframe and terrace tightly. Aluminum manual sliding door for cold room