Description No matter what instrument it is, it needs a good accessory, and our rubber O ring set is designed to better service your guitar! Its size is moderate and suitable for most models of guitar Pick up Knob. It can become your right-hand assistant whether it is daily practice or professional competition. Features -Color:Black -Material:Rubber -Size:1.60X1.60X0.20cm/0.63X0.63X0.08in -Applicable to most guitarpick up knob on the market, practical and professional. -Excellent and premium rubber materials are strictly selected for better performance. -It's easy to store because it's so small that it won't be inconvenient to carry with you. -You can use it for yourself or give it as a gift to beginners or friends. They will be encouraged. -You can get this set of rubber O shape ring at an absolutely favorable price. Don't hesitate. You deserve one. -There is a large quantity for you to use. packed well, small size, easy to carry and store. Package List100 x O rings