Uxcell Doorbell Switch (20 Piece) Product name : doorbell switch; power : AC 12v-240v 3A Shape : round; material : plastic, electronic parts Color : white, Black, Red; center hole Dia : 8Mm/0.31" Size : 4.5 x 3.3Cm/1.3&#39; &#39; x 1.1&#39; &#39; (d*t); weight : 278G Standard structure : 20Pcs x doorbell switch