Infinity 751-2417 Polydome Mid Diaphragm

Genuine Infinity Polydome 2″ Midrange Diaphragm for 902-3186 and 902-5016  used in RS3a, RS4, RS5, RS6, RS3b, RS4B, RS5b, RS6b, ES83, ES200, ES300, RS 3a, RS 4, RS 5, RS 6, RS 3b, RS 4B, RS 5b, RS 6b, ES 83, ES 200, ES 300, RS6000 Mid. Replaces 751-2244.

This diaphragm is obsolete. You will need to replace the midrange unit. The D76MX is a great replacement midrange option.