TW-11-BLK-1; Apem TW Series; Hall effect thumbwheels; Model: Without Tab; Output: OV to 5V; Color: Black; Spring Tension: Standard; Key Features:- 5 million cycles - Hall effect technology - Proportional control - Self-centering single-axis design - Choice of wheel colors: red, gray, black, or blue - EMI/RFI immunity;