uxcell 3pcs 21mmx6mm Aluminium Potentiometer Control Knob Cap Knurled Button Product Name: Potentiometer Control Knob Cap; Country of Manufacture: CHINA Material: Aluminium Alloy, Nylon; Net Weight: 14g Package Content: 3 x Potentiometer Control Knob Cap; Main Color: Gold Tone Shaft Hole Diameter: 6mm(0.24") Total Size: 21mm x 17mm(0.8" x 0.7")(Max.D*H)