Item Number HWTZ50-01 Voice Coil Diameter (mm) 50.8 Frame Material KSV Voice Coil Material CCAW Diaphragm Material Titanium Diaphragm Edge Dot Diaphragm Diameter (mm) 67 Diaphragm Height(mm) 9.5 "Diaphragm Thickness(mm)" 0.03 DCR (ohm) 7.2 Aluminum Ring Diameter(mm)" 83 Voice coil: 2" (50mm) Diameter: 4.5" (115mm) Impedance: 8 ohm, DCR: 6 ohm Titanium dome with voice coil on Kapton former to fit original Peavey This horn diaphragm is not the original Peavey item, just the cheaper but quality replacement item. We are ONE-STOP factory that offer many high pitch horn diaphragm, compression driver, tweeter. If you have any questions, pls contact us, we have professional engineers.