Telephone Socket,phone socket,tel outlet(BS Standard) Features: 1) E438: 1 gang telephone socket, secondary 2) E439: 1 gang t Telephone Socket,phone socket,tel outlet(BS Standard)Features:1) E438: 1 gang telephone socket, secondary2) E439: 1 gang telephone socket, master Inner packing:10pcs/inner box Outer packing:100pcs/ctn