This is the Fluval 03 Series Rigid Elbow. It is used as a replacement Rigid Elbow for Hagen Fluval 103, 203, 303 and 403 canister filters. The elbow pieces may wear faster than other pieces on the filter as they “bend” around other parts. While the rigidness of this elbow piece keeps it from wearing faster than other hoses portions. Some pieces do need to be changed regularly for maintenance.
Model number: Fluval part A-15515.