2.5mm DC Type Reversable Power Supply Plug.Part No. FSR04.This plug can be used with any of our reversable power supplies listed This plug suits DC type power input sockets with a 2.5mm diameter centre pin. Outside diameter of plug - 5.4mm, length - 12mm. Male pins 3.2mm apart.We have been supplying appliance parts to the trade and retail for over 25 years. Buy with confidence.