The Filbur FC-1287M is a compatible replacement for the following water filter cartridges: Waterway Clearwater II 150, Clearwater II 150, Pro Clean 150, Waterway Plastics 817-0150N, Waterway Plastics 817-0150P, Unicel C-8414, Pleatco PWWCT150/-M/PC150/-M/-4. The Waterway Clearwater II 150 with Microban is a compatible replacement pool and spa water filter cartridge that prevents microbes such as mold, fungi, bacteria and mildew from growing or reproducing, which can cause unpleasant odors. This replacement water filter is very durable and built with sharp pleat folds with a high dirt-holding capacity. Specifications: Area: 150 sq. ft., Bottom: 4-inch Open, Part number: FC-1287M, Top: 4-inch Open with Core, Weight: 4 oz., Dimensions: 8 15/16-inch Diameter x 23 5/16-inch