This effector cap adopted high-grade material and workmanship, and finally becomes perfect accessory that can match your guitar effector. In the long practice time, you must need their company and always be ready for your replacement needs. They are your . Features -Color: Black -Material: Aluminum Alloy -Size: 2.00X2.00X1.00cm/0.79X0.79X0.39in -The installation is stable and will not fall off easily, which will not affect your performance. -It is made of aluminum alloy, which is wear-resistant, durable and , and keeps your effector in a stable state at any time. -No matter they are used as accessories for guitar practice or performance, they are practical to use. -This effector knob is easy for you to use and replace, which can be used for a long time. -It can help you form a perfect guitar effector and play a better timbre while play the electric guitar. Package list: 1 x Guitar Effector Knob 1 x Wrench