PRS Type Lampshade Knob mm Standard Dark Brown Set of 2 New and unused, but may have minor scuffs as it is an imported item. The following is an explanation by AI: It is not octagonal. [High-Quality Material] Made of transparent plastic, it is durable and can be used for a long time. [Precise Scale] It has a scale from 1 to 10, making it easy to set and highly visible. [Stylish Design] The blue octagonal design enhances the appearance of the instrument and adds a unique accent. - Color: Blue - Shape: Octagonal - Numbers: 1-10 scale - Material: Transparent plastic - Use: Control knob for guitar/bass Thank you for looking.