A plug is supplied with each conduit end piece. Conduit end piece AJ5.20 is primarily used for termination of plastic conduits in concrete casting. After casting, the conduit end piece is cut to the desired length at one of the cut-off grooves, and the trunking is continued with a conduit of the same size. The plug protects the conduit from dirt, concrete and foreign particles. Made of halogen free material (IEC/61249-2-21).