ITEM NO. BL-0003 size:13.8x14.3mm speaker knob speaker partssize: 13.8x14.3mmall kinds of plastic horns are ... accessories,celling speaker cabinet,power amplifier parts,such as speaker handle,speaker grille,stell grill,metal mesh sheet,plastic horn,loudspeaker ... ,celling speaker cabinet,in-wall speaker cabinet,power amplifier panel,knob and so on. speaker ...