Pentair 073130 Impeller Replacement WhisperFlo 1000 Series Inground Pool and Spa Pump Impeller replacement Fits Pentair WhisperFlo 1000 Series inground pump models WF-8, WF-30, WFE-8, WFE-30, WFK-8, WFDS-8, WFDS-30 Measures 5-1/4-inch length by 2-1/4-inch height by 5-1/4-inch width