Hello. Welcome to Futurlec. The electronic components Superstore. To find the component your looking for, either search by Part Number or visit the relative department. Need Help. KNOBS KNOB3 - Black Aluminium with Pointer - Miniature Photograph Features Suits 1/4" Shafts Suitable for use with Rotary Potentiometers or Rotary Switches Set Screw for Fixing Solid Construction and Feel for a Professional Look Knurled Surface for Sensitive Control Dimensions: Height - 18mm, Diameter - 16mm