This Is Brand New Aftermarket Cerwin Vega Foster / Fostex Driver, Tweeter. LONG FRAME Please Note This Cerwin Vega Diaphragm Is Longer This Is CerwinVega replacement diaphragms for H25 series tweeters & horn drivers including H-25, H 25, H25-F, H25F, HO25, HO25F, HO-25, HO25-F, HO 25, CT15, CT-15 CT 15, and many many more. This diaphragm has a 1" voice coil. The complete diaphragm measures 3 1/8". Fostex / Foster also makes a diaphragm that looks very similar to this Vega diaphragm, but the Fostex / Foster diaphragm is smaller measuring 2 13/16". We also sell the Foster / Fostex. Specifications Voice Coil diameter: 1" Voice Coil Flange OD: ~1-3/4" Overall Length: 3.14" 79.9mm Overall width of terminals: 0.925" Impedance: 8 Ohms Weight: 0.04 Lbs We Carry A Full Line Of RCF, Celestion & Eminence 18 Sound Speakers & Drivers If Youre Looking A Particular Model And You Dont See It Here Please Send Us A Message