... for external packing of such products as food, beverage, medicine, video/audio products, metal ware. Cosmetics, books, toy, plastic and electronic ... circulate wind. 2:Top open cover, easier for check and repair. 3:Super-strong cooling system to ensure perfect shape after ... heat-shrinking. 4:top open system for easier check and repair with beautiful outlook. Specification: Tunnel size(L*W*H)1800 ...