Specification:Product Name :Switch KnobShaft Hole Dia.:6mm / 0.24inchOverall Size:14.5mm x 14.5mm/0.57inch x 0.57inch(D*H)Material:PlasticColor:Black,WhiteWeight:25gPackage Included:20 Pcs x Switch KnobDescriptions:The Rotary Knob is useful for light dimmer control switch.