Guild knobs, set of 4. These are aftermarket products imported from overseas. They have gold tops and black bodies with white number printing. This is a set of 4 knobs for metric size, 2 for volume and 2 for tone. The size is approximately 28.0mm in maximum outer diameter and approximately 14.7mm in height. Compatible only with metric-sized pots. They cannot be used with USA pots of inch specifications such as CTS. * If you feel the fit is loose, please adjust by slightly widening the pot shaft. Please check the number of splines on your pots to determine compatibility. The right side of image 5 shows a Japanese metric-sized pot shaft.