The Amplifier Knob Caps are compatible with adjusting the volume in amplifier audio systems. The compact design allows compatible with easy installation and convenient use. The volume control knob cap not only adds extra protection to the knobs but also enhances comcompatible witht during operation. Made of aluminum alloy, these knobs are built to last and withstand long-term use without damage. Experience precise volume control and achieve your desired audio effect with these knobs. Features -Color:Black -Material:Aluminium alloy -Size:2.60X2.60X1.40cm/1.02X1.02X0.55in -Inner hole diameter:6mm -Practical: Ideal compatible with adjusting the volume in amplifier audio systems, this set of shaft volume knobs is a must-have compatible with . -Compact design: these volume control knobs are easy to install and use, making them compatible with diy audio projects. -Versatile: The volume control knob cap not only enhances protection compatible with the knob but also provides added comcompatible witht during use. -Aluminum alloy: these volume knobs are durable and built to last, ensuring percompatible withmance. -Precise: Achieve the sound effect with precise volume adjustment using these volume control knobs. Package list: x knobs