Ordering the right memory to upgrade a CISCO ASR1002-5G

Hi community,

I would like to upgrade the memory for an ASR1002-5G-K9, however the kit I just ordered seems to not be fitting.

We ordered this P/Ns M-ASR1K-1001-16GB however this seems to be too long when It should be shorter and wider.

Does anyone has an idea of the right P/Ns?

I thought it might be this one : M-ASR1K-RP1-4GB

Any of help that would prevent me to buy the wrong product again is more than welcomed :)

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Thanks