HQRP 6-Pack Fine Media Filter Pad for Eheim Classic 2217/600 External Canister Filter, 2616175/4011708260654 Replacement Coaster HQRP&reg; 6-Pack Fine Media Filter Replacement plus HQRP&reg; Coaster; Reusable several times over. To clean just rinse and squeeze out; For fresh and sea water; 100% Compatible with Original filter; 2 weeks DOA replacement warranty!