Fluval Impeller Seal Ring for Canister Filters, 60-Millimeter Dogit dog 2010 fall/winter clothing collection for larger dogs hooded sweater coat Fits Fluval 303, 403 external canister filter models A670, A675 Helps to prevent media by-pass and properly direct water flow through the outflow of Fluval canister filter Comes in polybag with header Measures 66-millimeter diameter