Genuine nickel-plated / or Gold plated contacts TANNOY 4mm speaker speaker sockets, beautifully mounted on plate.
Fitted to many speakers, Tannoy, Rogers, Harbeth, etc and a million other speakers, can be removed and used without mount plate.
Accepts 4mm plugs. Threaded part approx 4.2mm, hole for wire approx 5mm.
DO NOT CONFUSE THESE WITH MANY CHEAP VERY INFERIORS TYPES.