This is a Circuit Shop Audio Diaphragm made to EV specs. It fits the EV DH2001, DH2010, DH2010A, DH1202, DH3 and other drivers. This diarphragm is direct replacement for EV part numbers 81498XX, 81514XX, 89858XX, and 81014XX. Specs: Overall diameter - 2.0" * Voice Coil Diameter - 1.25" * DCR - 5.2 ohm * Impedance - 8 Ohm. Circuit Shop Audio diaphragms are gaurenteed to fit perfectly and sound just like the original. Dont settle for cheap "aftermarket" diaphragms.