This replacement filter cartridge comes with a technical specification of Filbur# FC-2324, Pleatco # PRB8.5, Unicel # C-2303, and OEM # 17-0052. This product can handle a top load of 8.5 Sq. Ft. and is a high performance filter cartridge. This state of the art 8.5 sq. ft. Rainbow-Chloro, Emerald Spas, Pentair Pool Products filter is of superior quality as per industry standards. This filter comes with Open Hole of 2 1/8" at the top and at the bottom. It is 17 1/16" in length and 2 7/8" wide. It efficiently provides you dust, sand and worm free clean and clear water solution for your pools and spas. The best in the industry this product matches all your water purifying needs and offers quality with cleanliness and hygiene par excellence
Superior Performance of Unicel C-2303
By Michael Smith
Finally, I replaced Unicel C-2303 cartridge of my Filbur filter and I was surprised that it really works, the product is much effective as per expectations of mine.