Q. I have a lot of caps and not sure if they will fit on these knobs. The part of the cap which fits inside the knob is 8mm in diameter - what is the diameter of the knob? None of the technical details give this information (unless I miss it somehow). Even the caps which suit it (Re'an caps) only say 19mm knob. Let me know, thanks!
A. Hi Bob, thank you for your question. 6mm push fit.