These junction boxes are used to connect cables in order to add sockets, lighting points, and extend circuits, among other things. They can also be used to repair damaged cables by replacing a section of cable. These are constructed of polyvinyl chloride plastic. These junction boxes are commonly found in industries. They have a smooth surface and are waterproof. They can be used both at home and in industry. They weigh about 9 grams and are white in color.