This Is A Brand New Diaphragm Replacement for Lots Of Hi Frequency Tweeter Driver Please Look And Make Sure The Diaphragm You Are Ordering Matches The Pictures Above & The Specs Below Voice Coil Diameter :25.4mm Impedance :8 Ohm Dome : Titanium Outer Ring Frame Diameter : ~43.5mm The Center Distance Of The Two Post Terminals : ~83.5mm (90° Upright) Overall Length Of Frame : ~83.5