This Is A Brand New Aftermarket Replacement RCF ND3020 Titanium Diaphragm For ND3020 (8 Ohm) Please Look And Make Sure The Diaphragm You Are Ordering Matches The Pictures Above & The Specs Below Voice Coil Diameter :74.4mm Impedance : 8 Ohm Overall Diameter : 103mm The Center Distance Of The Two Post Terminals : 119mm We Carry A Full Line Of RCF, 18 Sound, Celestion & Eminence Speakers & Drivers If Youre Looking A Particular Model And You Dont See It Here Please Send Us A Message