Features:brand new and high qualityImported titanium film, greater sound pressure than resin film.It is voice coil for professional tweeter speaker.Lightweight and portable.Convenient for you to store and manageMade of high-quality materials, exquisited workmanship, very good quality and long service life.As tweeter speaker accessory. Specifications:Material:TitaniumCoil diameter:Approx. 24.8mm/0.97inchesOuter diameter of diaphragm: 39mmHeight of diaphragm: 3.8mmThickness of diaphragm: 0.07Impedance: 3.6Outside diameter of aluminum ring: 55mm/2.16inches Note:1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Package includes:1x Treble Voice Coil