Length:Length is measured from the outside edge of end cap to end cap, not including any handles, threads or slip fittings. 5-1/8"
Bottom:This is the actual inside hole diameter, excluding any taper.3-3/4" Open
Premium replacement for:Unicel:Unicel part numbers either start with a "C" or contain a "CH" like "C-8475RA" or "6CH-49".C-6324
Filbur:Filbur part numbers start with an "FC-" like "FC-0360".FC-3135
You have the best price for these filters and the more I buy the cheaper they are each.
This is the correct filter for my tub and it came quickly.
Nice filter at a reasonable price.