Witch Hat Knobs Top Hat Knobs Tone Volume Control Knobs for Electric Guitar Bass Amplifier Effect Pedal HOT perfect for USA made electric guitar/bass/amplifier/effect pedal etc._x000D_ Inch size, fine 24 splines, will fit most American made 6mm (15/64 inch) split shaft potentiometers like CTS/Fender/DiMarzio/Bourns, will NOT fit metric size potentiometers like Alpha_x000D_ Made of plastic, aluminum top_x000D_ _x000D_ Colour:Black & White_x000D_ Material:Plastic, aluminum_x000D_ Size:Inner hole diameter:6mm (15/64 inch), height:16mm (5/8 inch), base outer diameter:29mm (1-9/64 inch)_x000D_ _x000D_ Package Contents:_x000D_ 4 * knobs (2T+2V)_x000D_ _x000D_ Only the above package content, other products are not included._x000D_ Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm. _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_