The IEC small radio type rotary Potentiometer is either wire wound or carbon track - depending on the resistance value. The housing is the same as used in the excellent IEC "Electricity Kit" EM1763-001 with 4mm sockets for connection. It is designed for use in the hands of students and is tough and long lasting. Values can be 20, 50, 100, 1000, 10,000 ohms as a wire wound potentiometer type. Values can be 25,000, 50,000, 100,000 ohms as a carbon track potentiometer type.

Read the PDF file for more information.