Item Number HWTZ44-05 Voice Coil Diameter (mm) 44.4 Frame Material KSV Voice Coil Material ccaw Diaphragm Material Titanium Diaphragm Diameter (mm) 63 Diaphragm Height(mm) 1.3 Diaphragm Thickness(mm) 0.03 DCR (ohm) 7.2Ω Aluminum Ring Diameter(mm) 75 Specs: Voice coil: 1-3/4" (44.4mm), Diameter: 2-15/16" (75mm), Impedance: 8 ohm, DCR: 7.2 Fit for JBL 075, 076, 077, 2402, 2402H, 2404, 2404H, 2404H-1, 2405, 2405H driver / horn, P-Audio's PST-535 and PST-545 Supertweeters Imported titanium film with aluminum voice coil on a Kapton former, high quality. This item is not the original JBL item, just the cheaper replacement item. TATE Electronic is ONE-STOP factory that offer many high pitch horn diaphragm, compression driver, tweeter.