AP420 Filter vs AP420-7 Filter

[ccfool]

Is the AP420 filter the same as the AP420-7? I need to buy replacement filters and the box in which the old filter came in reads "AP420-7"

[waterfilters]

Please look at the replacements tab to locate your system to be sure these will work.
Aqua-Pure AP420 Replacement Filter and CUNO AquaPure AP-420 Sediment Water Filters.

Thank you,
WaterFilters.NET