Length:Length is measured from the outside edge of end cap to end cap, not including any handles, threads or slip fittings. 10-1/4"
Top:This is the actual inside hole diameter, excluding any taper.1-15/16" Open
Bottom:This is the actual inside hole diameter, excluding any taper.1-15/16" Open
Premium replacement for:Unicel:Unicel part numbers either start with a "C" or contain a "CH" like "C-8475RA" or "6CH-49".C-5431
Pleatco:Pleatco part numbers start with a "P" like "PWW100ST".PWK30V-XP
Filbur:Filbur part numbers start with an "FC-" like "FC-0360".FC-3910
Fit very well, merchant shipped very quickly, new product.
Very good price and was delivered in a few days.
They have great customer service and equally great products. Recommend them to everyone with a spa or pool.
Bore of filterror was to small I had to modify it with my Dreml tool.