uxcell Lamp Dimmer Control Rotary Knob Cap 15 x 17mm 6Pcs Black Product Name: Switch Knob; Country of Manufacture: CHINA Material: Plastic, Metal; Net Weight: 15g Package Content: 6 x Switch Knob; Main Color: Black Overall Size: 15 x 17mm/0.6" x 0.7"(D*H) Shaft Hole Dia.: 6mm/0.24"