30-21-13-3, 18.5mm, black. Outside diameter [mm]: 18.5mm. Color: black. Component family: potentiometer knobs. External height [mm]: 6.5 mm. Manufacturer's product group: 30. Material: plastic. Number of turns: -. Outer length [mm]: 18.5mm. Outer width [mm]: 18.5mm. Potentiometer accessory type: rotary knob cover. Registration: direction arrow. RoHS: yes. Surface: matt. Original product from manufacturer: Ritel. Quantity in stock updated on 11/02/2025, 22:15