- 38mm solid shaft optical rotary encoder - Can be used with Arduino for various projects - External diameter 38mm - small size, heavy duty, light weight, easy for installation - Resolution up to 3600 PPR - 6mm shaft size - 5-30VDC source, please specify the voltage while order with us - Aluminum housing, cable side entry or rear entry selectable - Standard cable length is 2 meters, cable length can be custom made