Length:Length is measured from the outside edge of end cap to end cap, not including any handles, threads or slip fittings. 13-5/16"
Top:This is the actual inside hole diameter, excluding any taper.2-3/8" Open
Bottom:This is the actual inside hole diameter, excluding any taper.2-3/8" Open
Media:25 SFAntimicrobial Blue Antimicrobial Media inhibits the growth of bacteria on the pleated fabric that can foul and degrade a cartridge.
Premium replacement for:Unicel:Unicel part numbers either start with a "C" or contain a "CH" like "C-8475RA" or "6CH-49".C-5625RA
Pleatco:Pleatco part numbers start with a "P" like "PWW100ST".PJ25-IN-M4
Filbur:Filbur part numbers start with an "FC-" like "FC-0360".FC-1425M
I will buy this filter again. It appears to be made of good quality products and fits my spa perfectly.