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Specs:

Overall Diameter:  5" (127 mm)
Voice Coil Diameter:  3" (76.2 mm) Edgewound
Diaphragm Material: Titanium
Diaphragm Height: 15.2 mm
Nominal Impedance: 16 ohms

2pcs

Here is a list of the driver part #'s:
89796XX (use 81256XX), 0301251102, 301251001, DH1, DH1A, DH-1A, DH1AMT, DH1A-WP, DH1A-WPX, DH1012, DH-1012, DH1202, 89796 (use 81256XX), DH2012, DH-2012, N/DYM-1, N/DYM1MT, N/DYM1-0MT, ND6X-8, DML-1122APF, DML-1152APF, DML-1152MC, EJ1, EJ1X, FS-212, FS-212AC, TS550D-LX, TS940D, TS940D-LX, TS940S, TS9040D, TS9040D-LX, VARIPLEX B, F01U110542