The LG 4970EA4194A Washer Distortion Spring is the correct replacement for the following model numbers.
Distortion Spring
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5221EA1001S
5221ea1001s
WT901CF
wt901cf
WT901CW
wt901cw
5859EA1004F
wt901cw-drain-pump
WT901CF
wt901cf
WT901CW