Size: 16 ohmItem Number HWTZ50-03 Voice Coil Diameter (mm) 51.2 Frame Material KSV Voice Coil Material CCAW Diaphragm Material Titanium Diaphragm Edge Edge Folder Diaphragm Diameter mm67 Diaphragm Heightmm 12.5 Diaphragm Thicknessmm 0.05 DCR (ohm) 6 Outside Diameter 90