Check the listing for details. 4Pcs Cream Guitar Knobs Bass Knobs Push-in Volume Amplifier Audio Control Knobs. Color: Cream, Condition: New. Listed at 8.00 USD. 6mm knurled inner diameter.There are 16 grooved thick (18 tooth splined) shafts on the potentiometer.Will fit most guitars bass.Material: Acrylic.Color: CreamSIZE: As the picture.Package Included: 4 × KnobsPlease confirm the diameter of your guitar/bass pots before you order the item.Note:Due to the influence of shooting lighting/computer phone monitor, there is some color difference between the image and the actual product.There may be a dimension measurement error of ± 0.5mm. Warming Tips:Knobs only fit guitars or basses with metric 18 coarse splines split shaft pots with 6mm diameter, they DO NOT fit USA 24 fine splines split shaft pots as well as any other Solid shaft pots.In order to get correct knobs for your pots, please remove the current knobs from your guitar, count the splines on your pots.If they are 10 on each side, your pots will need 24 fine spines knobs.If they are 8 one each side, your pots will need 18 Coarse splines knobs.