THIS IS A 10" IMPELLER. I AM NOT SURE OF THE ANY PART NUMBER OR MODEL. NO PART OF THE UNIT IS MAGNETIC. THE IMPELLER IS MADE OF SOFT MATERIAL, REMINDS ME OF GRAPHITE. WILL MARK OF A PIECE OF PAPER LIKE A PENCIL. MEASUREMENTS ARE: OUTSIDE DIAMETER OF 10" 65MM THICK OUTER DIAMETER OF SHAFT IS 52MM INNER DIAMETER OF SHAFT IS A LITTLE UNDER 38MM THE KEYWAY IS EXACTLY 3/8" SHAFT EXTENDS 3" FROM IMPELLER THE SHAFT IS PRESSED INTO A RUBBER BUSHING MOUNT THAT EXTENDS 2-13/16" FROM THE REAR FACE OF THE IMPELLER IMPELLER IS FINISHED ON FRONT AND REAR AND HAS 4 PASSAGES BORED THROUGH. IF ANYONE READ THIS AND KNOWS WHAT THE IMPELLER IS USED FOR, PLEASE DROP ME A NOTE. ALL HELP IS APPRECIATED! THANKS, RB MS