Feature: 1.Every product has a unique Manufacturing Part Number label on the inner package that proves it has been qualified,which include Part Number,Model Number andinspection date information;2.If you have any questions about the item,please provide us the Manufacturing Part Number for checking,your profits will be guaranteed.3.It's suitable for electric guitar.4.Wonderful replacement for old damaged guitar control knobs.5.Made of ABS plastic,lightweight and come with high quality wrench.6.The inner middle hole diameter is about 5.92mm ,easy to use and install.SpecificationMaterial:ABS plastic Color:White,Black and Red Dimension:15 x 15 x 15mm/0.59 x 0.59 x 0.59 inchL x W x H Middle hole diameter:about 5.92mm/0.23 inchWeight:45gPackage include:3 x White Dice Guitar Control Knob3 x Black Dice Guitar Control Knob3 x Red Dice Guitar Control Knob3 x Wrenches