Waterproof. Dustproof. Laminar Flow Hood Cover for your FloCube ProFlow FFU. Three sizes available to fit your 2x2ft flow hood, 2x3ft flow hood, or 2x4ft flow hood. Keep your flow hood dust-free while not in use. Engineered to complement FloCube ProFlow Laminar Flow Hoods, this cover is available in a range of sizes, ensuring compatibility with various models. Cover and uncover your flow hood as needed.