This Is A Brand New Aftermarket Diaphragm Replacement for d&b Audio 1.3" Driver C3, Q1, Q7, Q10 Cabinets Please Look And Confirm The Diaphragm You Are Ordering Matches The Pictures Above & The Specs Below. Specs : Voice Coil Diameter :74.4mm Impedance :8 Ohm Dome Height : 13.5mm Outer Ring Diameter : 101.5mm The Center Distance Of The Two Post Terminals : 120.0mm FREE SHIPPING ONLY In the USA & Ship From USA. Most Orders Placed Before 3PM and Paid thru PayPal Are Shipped The Same Day.