A Brand New Original Martin Audio F 15, Diaphragm For B&C DE82 Made By P Audio. "Blue Titanium" Will Also Fit :B&C DE75-8,DE75TN,DE750-8,DE750TN,DE82,DE82TN,DE85,DE85TN,DM5001 Yorkville TX4 Cabinet The mylar/titanium diaphragm, a 3" edgewound flat aluminum wire voice coil,combine to deliver smooth response with low distortion. Please be Sure the Diaphragm You Are Ordering Matches The Pictures Above & The Specs Below