Replacement Titanium Dome Diaphragm For B&W CM2, CM4 Tweeter ZC12688 8Ω 26mm VCL Dome material: TitaniumVoice coil diameter: 1 inch / 26mm (25.9mm)Nominal impedance: 8ΩPacking: 1 piece We ship from China via Speedpak to most of the countries. Most of the orders will be shipped the next day. Weekends orders will be shipped the next Monday. Please feel free to contact us, if there is any problems