This loudspeaker unit apply to home theatre system, professional audio and compression driveFeatures:DIY tweeter voice coil for home theater systems, professional audio and compression drives.High reliability and low consumption.The tone is good, the distortion is small, and the treble is clear and transparent.Made of titanium film, durable.With terminal block, convenient wiring.Specification:Coil material: imported copper clad aluminum round wireCoil bobbin: Kabitong (KSV)Voice coil inner diameter: 34.4mm/1.3 inTerminal center distance: 74mm/2.9inAluminum sheet outer diameter: 63mm/2.5inBall top height: 5.5mm/0.2inSound film material: Titanium FilmResistance: 8Power: Comparable to original power (depending on magnetic steel conversion efficiency)Package list:1 * 34.4mm Tweeter Voice CoilNote:The measurement allowed error is +/- 1-3cm..Please note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering.