This Is A Diaphragm For ART710, ART712A Mk1, ART712 Mk2, ART715A, Mk1, & Mk2 Speaker Cabinets. Also For RCF ND350 Diaphragm (8 Ohm) P/N 15420035 For ND350, CD350 & CD400 Driver. This Diaphragm With RCF N350 It's Not The Same.