This Is A Brand NEW Compatible Aftermarket Replacement Diaphragm FBT JOLLY 19455 Tweeter Driver @ 8 Ohms. for FBT Jolly Series 8R, 8B, 8RA, 12 RA, 12B, 12BA, 15RA, 15B, 15BA Cabinets DIAPHRAM Z09370 FOR CD83.26 Please Look And Confirm The Diaphragm You Are Ordering Matches The Pictures Above & The Specs Below. SPECS : Voice Coil Diameter :25.4mm Impedance : 8 Ohm Dome : Mylar The Center Distance Of The Two Post Terminals : ~95.5mm