Hagen Part #A-575Complete with filtering materialFits all sizes of AquaClear Power HeadsUses A-578 Hagen AquaClear Powerhead Quick Filter CartridgeThe AquaClear Quick Filter Powerhead Attachment removes particles and debris resulting in crystal clear aquarium water. Ideal for polishing water after maintenance, it is safe for fresh and saltwater use. The unit is exclusively designed to fit AC Powerhead models 10,20,30,50 and 70.