The LG 4975JA1042D Rail Guide is the correct replacement for the following model numbers.
Rail Guide Assembly
Does this part fit my model?
5231JA2006F
5231ja2006f-refrigerator-water-filter-lt600p
GRL227SSPA
grl227sspa
GRL227SSPH
grl227ssph
LSC21943ST
lsc21943st
GRL227SSPH
grl227ssph
LSC21943ST