This Is A Brand New 

Diaphragm Replacement for  

18 Sound ND 1070 / ND 1090 / HD 1050

Voice Coil Diameter : 44.4mm / 1.75″ 

Impedance : 8 Ohm

Outer Ring Diameter : 72mm / 2.8″

The Center Distance Of The Two Post Terminals : ~82mm / 3.2″

Packing : 2pcs/lot