uxcell Silver Tone Solid Aluminum Hifi Speaker Radio Volume Knobs 20x22mm Product Name : Speaker Volume Knobs;Material : Aluminum Diameter : 20mm/ 0.78";Height : 22mm/ 0.87" Shaft Hole : 6mm/ 0.2";Color : Silver Tone Weight : 17g Package Content : 1 xSpeakerVolumeKnobs