Arcol acd22 10 turn counting dial 22mm arcol acd22 6 35 10 this counting dial is designed for use with precision potentiometers and other rotating devices the dial has a satin chrome finish and a black plastic knob and accepts oslash 6 35mm shafts suitable for applications such as telecommunications portable electronics test and measurement medical etc arcol acd22 6 35 10 10 turn 22mm analogue counting dial