Russell Bateman June 2021 last update:
This is for Samsung model RF28R7201SR, serial number 0B2C43BMB00790V.
The replacement water filter link is an Amazon: Waterspecialist DA29-00020B Samsung Water Filter for Refrigerator, Replacement for DA29-00020A/B, HAF-CIN/EXP, DA29-00020B-1, RF25HMEDBSR, RF28HMEDBSR, RS25J500DSR&More Models, 3 Carbon Filters.
It's for 3 filters, cost $29.98.