Which Pentek filter

I have a 2013 International that has a Pentek GS-10ro under sink water filter. Our Airstream is stored out of state and I'd like to get a replacement filter ordered for it ASAP. We will be heading down to AZ soon to be using it and I'm not sure of the specific filter. There is a GS-10ro-B, GS-10ro-C, GS-10ro-G, etc. with different size fittings.



Has anyone ordered a replacement for a newer trailer and know which one is the correct model?



Thanks!