ImpellerPump:F95Material:Neoprene (for cooling)Outer Diameter:3.74"Inner Diameter:SplinesWidth:5.12"A worn or damaged impeller can cause system failure or engine breakdown. SPX&';s Johnson Pump brand impellers are developed and manufactured for maximum flow and long life. With a genuine spare impeller you can also be sure that you are getting the quality required by engine manufacturers and professionals. Quick Guide (pdf)Owner&';s Manual (pdf) .embed-container iframe, .embed-container object, .embed-container embed { position: absolute; top: 0; left: 0; width: 100%; height: 100%; }