450 series CTS Premium 550k split shaft CTS potentiometer. Guitar pot with audio (log) taper. This guitar pot is an ideal upgrade for volume and tone controls on instruments that use Humbucking pickups. Split shaft for push fit knobs. Sold individually. Not all CTS pots are alike - the CTS pots that we stock are the top-of-the-range 450 series and are developed using 9% +/- tolerances and built at 10% over the standard 500K rating (550K). This ensures optimum performance and guarantees that your potentiometers will always be at least the value stated. Our CTS pots are unlike many other standard pots that use industry standard 20% tolerances where, in most cases, are way under the specifications you need to ensure good tone from your pickups. We added brass components and a high quality wiper versus what comes standard on most run of the mill pots to ensure long life, quality and consistent performance. Comes complete with two nuts and washers. Which of your replacement volume and tone knobs will fit this pot? Our CTS pots have 24 splines which is the same specification that many USA-made instruments use, such as guitars from Fender and Gibson. If your guitar already is made in the USA then your original knobs should fit straight on. If you are fitting these pots to an instrument that previously was fitted with pots that have 18 splines (typically Epiphone or any other guitar made in Japan, Korea or China) then chances are the existing knobs will not fit. Therefore, please see our range of replacement knobs that are labelled as being "USA fit and CTS". Any of the other knobs labelled as 'metric' will not fit. A customer review: Here's what one happy customer had to say about our CTS pots - "I have to say that the CTS pots that I have received have been a revelation to the guitars tone. It is now clearer than ever as well as being less susceptible to background noise. On top of this the smoothness of the tapers exudes quality and they are well worth the asking price." Important measurements: Tolerance = +/- 9% Can Size = 23.8mm (15/16 in.) radius X 9.5mm (3/8 in.) height Bushing Threads = 3/8-32 Bushing Height = 9.5mm (3/8 in). Shaft Type - split Shaft Diameter = 9.5mm (please ensure that the pickguard / control plate that the pot is mounting onto has a 9.6mm diameter hole) Spline Count = 24 (NOT metric) Length of threaded shaft - 9.5mm (3/8 in.) Value = 550K Ohms