Self-adhesive protective film for the exterior of painted vehicles, especially cars, characterized in thatthe backing of the protective film is a film coated on one side with an adhesive compositionwhose bond strength on steel is between 0. The first tube has a first end and a second end, an inner wall and an outer wall. The images in the challenge may be drawn from image databases or the Internet, and may be part of a set of images that have been screened for difficulty with respect to computers. A bushing tube is then welded to one of the first and second cast components and is subsequently attached to a vehicle frame member. The node optionally changes the duration of its detection period andor the time at which it listens for network activity relative to the start of each beacon interval. Conductive material plugs are formed within the narrowed openings.