The Impeller Is Designed With A Fan-Shaped Form That Allows For The Creation Of Water Flow Within The Pump, Ensuring Proper System Functioning. Please Note That The Package Only Includes The Impeller And Does Not Include Any Other Accessories Or Parts. It Is Necessary To Carefully Read The Instructions For Installation And Use Before Using The Impeller. The Jabsco 018 17935-01 Impeller Is An Ideal Choice For Those Looking For A High-Quality Replacement Impeller For Their Jabsco Water Circulation Pump.