HQRP Coarse and Fine Flat Box Filter Foam Pads for Tetra SF1 / #26592 Submersible Pond Filter Coaster HQRP&reg; Black and Blue Foam Filter Pads + HQRP&reg; Coaster; Coarse and Fine-mesh foam Pads for removing debris and prevention pump from clogging; The pads are used in SF1 Submersible Pond Flat Box Filter for FK5 / FK6 Filtration Fountain Kits; Measures 9 1/2" x 2 3/8" x 12 1/4"; 100% Compatible with Original filter. 2 weeks DOA replacement warranty!