CDVI's cable transitions provide a secure method for cable connection between a fixed and a moving point (e.g. door frame and door leaf). The cable is protected by the stainless steel spiral hose. The inner diameter of the spiral hose is 9 mm and is therefore suitable for the most common multi-core cables for door locks and controls. The GF45 cable transition is the most common cable transition on the market. The covers of the rectangular zinc die-cast end pieces are fixed by means of 4 screws.