Warehouse Ventilating Security Bug Screen for Dock & Bay Doors (White Frame with 17x20 PVC Coated White Superscreen Fabric) Prevents access to warehouse by unexpected or unannounced visitors Helps deter internal and external theft from warehouse Lower Cooling Costs, Increase Worker Productivity & Comfort Increased Air Flow, Affordably ventilate multiple warehouse doors Keep out pests: Bugs, Birds and Animals