Description: 12 Pcs Guitar Speed Control Top Hat Knobs for Electric Guitar Made of high quality platic material, durable and long-lasting Lightweight and portable design looks simple but practical There are white, black and light yellow for your choice Perfect replacement parts for your electric guitars Specification: External Diameter: 19mm/0.75inch Height: 15mm/0.59inch Internal Diameter: 6mm/0.24inch Material: Plastic Package Includes: 12 Pieces Electric Guitar Knobs Note: Please allow 1-3cm measuring deviation due to manual measurement.(1cm=0.39inch) Due to the different monitor and light effect, the actual color of the item might be slightly different from the color showed on the pictures. Thank you