Check the listing for details. Pair 25MM Titanium Compression for Tweeter Diaphragms 8 Ohm Driver Stage Speaker. Condition: New, Made in China. Listed at 17.99 USD. STARAUDIO 2Pcs 25mm Titanium Compression Audio PA DJ Speaker Driver Tweeter Diaphragms Features: Brand New Diaphragm fit many Models 1" Compression driver. This is a DEURA DCD12 auction for new 8 ohm diaphragms that will fit many Models. This auction is for Diaphragm ONLY Driver Picture shown as reference model. Up for sale is two pieces 25.5mm (1") Horn Driver Diaphragm for Cerwin Vega V-15 V-30 V-43 V15 V30 V43 voice coil - Long frame Inside diameter of voice coil :25.5mm (1inch). Frame long :80mm (3 1/8 inch) This diaphragm has a copper voice coil on a Nomex former , and a Phenolic dome just like the original Fostex / Foster diaphragm. Specifications: 8 ohm Overall diaphragm diameter 1 3/4-in or 45mm Overall length 2 3/4-in or 70mm Voice coil diameter 1-in or 25mm.