Very high quality feel, weighty. Multiple available. 48mm on the bottom, top bit is smaller.
48mm giant satin Black knob mushroom amplifier radio pointer 6mm vintage style
Vintage Brass With Black Knob 4x4 Mandolin Tuners Martin Gibson ? FREE SHIPPING
26mm Black knob mushroom amplifier radio control pointer 6mm vintage style RCA
Black knob Sequential Circuits Prophet-5 / 10 Synthesizer,Spare,Part Synth, Repa
12 string guitar top nut 48mm x 6mm x 8mm aged white / 48mm x 6mm x 9.5mm Cream
BLACK LIMBA / KORINA 2-piece Strat guitar body 610 x 326 x 48mm S6
