... 3 easy shipping and quick installation 40ft new container house with good insulation Product descriptionThe welded container house id made of steel ... .2. Convenient for moving , transporting, water cleaning.3. Service life:20 years.4. Good waterproof , sound-insulated, heat preservation, environmental protection.5 ... , 40 GP, 40 OTAppearance and internal 40ft new container house with good insulation