Regarding to Electro-Magnetic Audio Transducer we can supply all these items we can supply all these items.Such as:1.L:7.5mm×W:7.5mm×H:2.5mm2.L:7.5mm×W:7.5mm×H:3mm3.L:8.5mm×W:8.5mm×H:3mm4.L:8.5mm×W:8.5mm×H:3mm (Middle hole)5.L:8.5mm×W:8.5mm×H:3.6mm Electro-Magnetic Audio Transducer
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