... NO. BL-0003 size:13.8x14.3mm speaker knob speaker partssize: 13.8x14.3mmall kinds of plastic ... professional loudspeaker parts,car speaker accessories,celling speaker cabinet,power amplifier parts,such as speaker handle,speaker grille,stell grill, ... ,loudspeaker corners,vent,speaker terminal,piezo tweeter,speker gasket,car speaker grill,celling speaker cabinet,in-wall speaker cabinet,power amplifier ...