ZXPC Diaphragm Compatible with Samson / Hartke HG00336 / CD34TI For RS12HD, RS215 and RS15HD Loud Speakers Cabinet. This Is Also Use On Many Drivers & Tweeters (Voice Coil) 34.4 mm or 1.35" Overall Diaphragm Diameter: 2.375" (60mm) Voice Coil Diameter: 1.35" (34.4mm) Impedance: 8 ohms