A method of producing an aluminium alloy brazing sheet for the manufacturing of light brazed assemblies, wherein said brazing sheet has good formability, combined with a low susceptibility to core penetration in the end annealed as-produced condition after stretching, forming andor shaping and brazing are disclosed. The barrel has a first end and a second end opposite thereof. There is also provided a transmission cable outlet device 20 comprising a hollow body member terminating in an end plate 33. A protective switch is set up for preventing a current flow through the anode. The system is designed so each of the panels may be easily hooked onto the car doors and locked in place when the doors are closed, protecting the vehicle from collisions and objects which may inadvertently bump the doors, causing unsightly dents and scratches.