Second Nature Products ASN25899 T-3 Energizer Motor Replacement for Whisper 2/3/4 Power Filters T-3 Energizer Motor replacement for Whisper 1-2-3-4 Replaces motor for the Whisper Power Filter models 2, 3, 40 and 60 This part rarely needs to be replaced Also fits the Top Fin 40 and 60 filter Comes with O-ring and power cord