The DL 14 series of Door loops are used to simplify and protect transmission of signals with a cable from window and doors to the frame. The loops consist of a long and stainless steel flexi-tube, with two end caps with locking grooves to secure the flexi-tube and provide a safe installation. The stainless steel flexi-tube is available in 2 lengths - 400 mm and 600 mm. The cable is protected against the sharp edges of the metal flexi-tube at each end with a plastic end caps that allows a maximum cable diameter of 8.8 mm. The metal flexi-tube has an outer diameter of 14 mm and an inner diameter of 10.5 mm. The door loops are available in a nickel-plated design or an either white or brown plastic coating.