* UPDATE JUNE 2021: New manufacturer --> Big increase in quality! *
Eight color choices and a super versatile 20mm diameter means you can get bossy with color, or stay classic in black. This mix-and-matchable Boss style knob features a removable film that protects the mirror cap and keeps it shiny in transit, as well as a brass cup insert with a flat-head set screw to hold it securely on a 1/4" smooth shaft potentiometer.
Boss style knob
Plastic with indicator
For 1/4" (6.4mm) smooth shaft pots
12mm (1/2") tall
20mm (3/4") outer diameter at the skirt
Note: I've got four different sizes of classic fluted Boss-style knobs, from extra-small (20mm) to extra-large (45mm). Check out the measurements for a size comparison.
Small: 20mm x 12mm
Medium: 27mm x 16mm
Large: 33mm x 16mm
Extra-large: 45mm x 20mm
Tip: The term "Boss" refers to the aesthetic design of this knob, with the mirror cap inset into a plastic knob shell. A Boss-style knob will not automatically fit all Boss pedals. The right fit depends on the shaft size of the knob's potentiometer. Read this post to figure out what kind of knob you need: https://lovemyswitches.com/news/what-knob-will-fit-on-my-gear/