This Cal Spa filter is a 25 Square Foot Filter Cartridge that is 4-15/16" Outside Diameter x 13-5/16" in Length. It has a hole in the top and the bottom that are 2 1/8". Don't just order this filter though be sure it is the correct size for your Cal Spa..
There are two other sizes that are poplar for Cal Spas links are below:
|Top Physical Dimension||2-1/8"|
|Bottom Physical Dimension||2-1/8"|
|Model||In-Line, Skim Filter 25sqft (3oz), Mytilus MY 30/50, Rainbow Dynamic 25sqft (3oz), Ultra Skim Filter 25sqft|
|Square Footage||25 sq ft|
|Unicel Number||htpC-4326, htpC-5623|
|OEM Number||17-2327, 17-4821, 2501, 25392, 3005845, 3301-2242, 33521, 817-2500|
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