Features: *Washable, moisture proof, anti-corrosive, environment protection *Separating the food prep to cold storage area, kitchen to the warehouse or anywhere you need to hide the clutter or reduce the noise from your backroom operations *Restricting access by customers, vendors or employees to your workshop *No electric, no hydraulic or pneumatic equipment, simple operation *The opening is in either directions by a hand, hand truck, pallet jack or even fork lift and closed itself when released (thanks to a twisting-spring system) *Fast and easy installation, no need for regular maintenance, energy saving and cost-effective solution, long-durability *Suitable for food processing, industrial, pharmaceutical, supermarket, warehouse, greenhouse and hospital etc.