The Aprilaire Ionizer Wire 4602 is for the Aprilaire Model 5000 Electronic Air Purifiers built after May 2005, which uses 9 ionizing wires. These are sold individually for periodic replacement as needed. These are used on units with an almond or light blue/grey door and a blue LED light.
I have had the 5000 model for 4 years....Never have broken one, found one broken, and have even taken off the frame too clean and no problems here
These wires are way too expensive and don't hold up. Six of our nine are broken, didn't even last the first year!!
These wires are extremely fragile and not very durable in my opinion. The ends pop off easily. One must be very careful when changing the media (filter) or these will break.