Check the listing for details. 2x 12 Edge Blue Acrylic Bass Guitar Knobs Transparent Volume Tone Control Knobs. Color: Blue, Condition: New. Listed at 2.63 USD. Product Name: 12 Edge Type Guitar KnobsColor: Transparent BlueShaft Hole Diameter: 6mm/ 0.23"Size:As the picture show.Package includes:2 x Guitar KnobsPush on knobs.Enhance the look of your guitar with these 2 transparent blue acrylic knobs. Knobs only fit metric 18 coarse splines split shaft pots with 5.8mm diameter.If there are 10 splines on each side, your pots will need 24 fine spines knobs.If there are 8 splines on each side, your pots will need 18 coarse splines knobs.These knobs are compatible with acoustic, electric, and bass guitars. They are designed to fit perfectly on the volume and tone controls of your guitar. Crafted in China, these knobs are made of high-quality materials and are built to last. The knobs come in a pack of two and are easy to install. Upgrade your guitar and give it a unique look with these 12 edge acrylic knobs.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.