Description This item is manufactured with premium material for durable and long lasting use. It is suitable for guitar bass and amp replacment. Fits import concentric pots and split shaft pots. It is great tool which can provide help in guitar replacment. Features - Color: Black - Material: Plastic. - Size: About 1.6 x 1.6 x 1.6cm. - Made of material, the knob is durable and long lasting use. - It is suitable for guitar bass and amp replacment. - Wonderful replacement for old damaged guitar control knobs. - The inner middle hole diameter is about 5.92mm ,easy to use and install. - Great tools which can provide help in guitar replacment. - Warm Tip: Dear buyer, Due to lighting effect,monitors brightness,manual measurement and etc, there could be some slight differences in the color and size between the photo and the actual item. sincerely hope that you can understand! Thank you! Package included: 1 set of Knobs