Assmann WSW RJ11/12/45 Cube Sockets, Black – 4/6/8 Pins – Assmann WSW A-20140, This A-20140 RJ10 Black Socket from Assmann WSW is a cube-shaped socket with 4 pins. Manufactured with phosphor bronze contacts and nylon UL94V-0 insulator material, this unshielded female socket offers 40MΩ max. contact resistance, plus an operating voltage of 125V DC. Assmann WSW A-20140 4 Pin RJ10 4P4C Socket Black