This Is A Brand New Aftermarket Replacement Mackie Neodymium Driver Diaphragm,Complete replacement diaphragm for ( 0013925 , DN10/1704-8 B&C DE12) for the Mackie 350 V1, 350, C 200. Also Use On FBT Speakers System, EV EVLX 112P & EV ELX 115P & Many MoreThis Will Not Work On The SRM 350 V2 Please Look And Make Sure The Diaphragm You Are Ordering Matches The Pictures Above & The Specs Below. Specs:Overall Diaphragm Diameter: 3 3/8" (85.7mm)Voice Coil Diameter: 1 7/16" (36.4mm)DCR: 5.5 OhmsNominal Impedance: 8 ohms Most Orders Placed Before 2PM and Paid thru PayPal Are Shipped The Same Day; Monday to Friday