Double-stacked Metal Knobs, 3-piece Replacement Parts, Non-slip Texture, Tone Control Knob, Easy Installation, Expanding the Range of Electric Guitar Bass (GD105 Chrome) : Amazon.co.uk: Musical Instruments & DJ
Harrogate Round Mushroom Mortice Door Knob in Matt Gun Metal- OE58MMKMBN at Simply Door Handles, OE58MMKMBN
Knurled Drawer Knobs in Satin Stainless Steel 30mm diameter - Handle King UK
Dual Concentric Metal Control Knob NC004 – Northwest Guitars