For CoreLok filter, choose "CoreLok Pump" from drop-down menu
For CoreDry, filters vary based on serial #
Gather product serial number from metal plate on the back of your CoreDry and choose corresponding filter from the drop-down based on the letter(s) in the serial number
977.1006 - CoreLok
977.1006 - CoreDry's w/ serial numbers containing the letter "B"
977.1002 - CoreDry's w/ serial numbers containing the letter "W"
977.1005 - CoreDry's w/ serial numbers containing the letters "KB" or "RA"