These knobs feel and look great, and are a pretty good price. You can probably get them cheaper in bulk, but having them available in a day or two on Ebay is worth quite a lot.They definitely are 6mm though. My project used two different types of pots (16mm and 1" alpha) that look the same but one type of pot had a slightly wider shaft, which these did not fit on.But, these knobs are well made, so I was able to use a drill to widen the bushing inside just a little bit, and it worked perfectly. I've tried that with other knobs in the past and they self destructed, but these ones handled it with no sweat at all.I highly recommend these.
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