KM 420i 520i Fax Memory

[anthony123]

Hello,
I have a customer that I sold a used 420i with Fax System (s) only. I want to max the memory with the 128mb expansion. Does anyone know if this is proprietary memory or can I use generic and what specs do I need. ThanksMemory.jpg

[bsm2]

You should be able to find 3rd party option
you will have to do a search