Insulated, rigid 4mm socket connector, with gold-plated contacts and a 1.9mm solder pin. Suitable for accepting spring-loaded 4mm plugs with rigid insulating sleeve. Socket made from brass. Push-fit mounting into cutout holes in plates or housings made of plastic, metal etc. https://elecena.pl/product/28044008/st-xe4-ubli-233150-20-seb4-f63-safety-jack-socket-4mm-gr-yel-1-piece 2025-03-19 https://elecena.pl/product/28044008/st-xe4-ubli-233150-20-seb4-f63-safety-jack-socket-4mm-gr-yel-1-piece 2025-11-13