Hayward X-Stream CCX150 Excel Filters XLS-821 fits Cartridges CCX1500RE, Unicel C-8316, Pleatco PXST150, Filbur FC1286 DIMENSIONS: HEIGHT 23.3125"; OUTSIDE DIAMETER 8.9375"; TOP INNER DIAMETER 4". BOTTOM INNER 4" MOST Orders are SHIP SAME DAY and DELIVERED in 3 BUSINESS DAYS. Replaces Cartridge CCX1500RE, Unicel C-8316, Pleatco PXST150, Filbur FC1286 Open Flow Core for optimal flow dynamics and less energy consumption during filtration process Durable, reinforced banding, and uniform pleats provides effective dirt loading and ease of cleaning