Replaces the following cartridges: Jacuzzi 25 Sq Ft CFT-25, Jacuzzi CFR-25 42-28941-08-R, Unicel C-5625, Filbur FC-1425, PJ25-IN-4, Pleatco PJ25-IN-4M, Aqua Kleen AK-4028, Aladdin 12507 Square Feet: 25 Outside Diameter: 5" Length: 13 5/16" Inside: 2 3/8"