2-Pack Guardian Spa Filter Replaces Unicel C-5345 Filbur FC-2970 Pleatco PLBS50 Antimicrobial Replaces Unicel C-5345, Filbur FC-2970, Pleatco PLB-S-50 Length: 10-1/8", Diameter: 5-5/16", Top opening: 2-1/8", Bottom opening: 2-1/8" 50 sq. ft. filtration area High-quality antimicrobial filtration fabric (equivalent to Reemay with Microban Antimicrobial Product