The brass shower wall elbow outlet with handset holder for concealed shower systems is available with a standard ½" BSP outlet for all standard shower hoses. It also has a 42mm ½" inlet thread with locking nuts for the reverse of board & tiles. The 45mm backplate is also large enough to give a great sleek looking design & is big enough to cover that inlet hole. The round brass shower wall elbow outlet built shower handset holder high shine chrome-plated finish standard ½" BSP outlet, compatible with all standard shower hoses 42mm ½" inlet thread with locking nuts 45mm round backplate.