Equivalent to 052-050-02
PF53
Fram PH 8172
Fram PH10960
sfwe
PH3614
That is a NAPA 1348.
AC Delco PF53
Wix has a filter look up site that lists many equivalents. wixfilters.com The Wix filter for the Kohler 12-050-01 is a 51056.
If you mean: 0.50 then they are 1/2, 2/4 and 3/6
That would be a Fram PH8172
.050 inch.050 inch