Hurricane HF4H935-01 Cartridge Filter is compatible with Unicel 4CH-935, PWW35L, Filbur FC-0820, Dynamic Series IV DFM, and DFML, Waterway 35 in-line, and other compatible models. Comes in an economical 2 pack, saving you $$$. Always measure your current filter's dimensions to ensure you are ordering the correct replacement filter. Made from durable, eco-friendly materials and less likely to collapse compared to traditional filters. Recommended replacement by Hot Tub Professionals.
