The roller shutters consist of many planks made of plastic, steel or aluminum, firmly interconnected by grooves. The connection provides the necessary tightness, and the cavities in the strips that can be empty or filled with foam — thermal insulation. When lifting, the strips are collected in a special compartment, wound on the shaft. Exactly the same design have roller shutters on the windows, with the exception of, perhaps, the lifting mechanism, which in window modifications can have an electric drive and equipped with automation. Naturally, for plumbing, such excesses are completely useless, although at the request of the customer you can think about this option.