IMPELLER 2HP XP-D11 SERIES OUTSIDE DIAMETER: 4-3/8" (A) THICKNESS: 1/4" (INSIDE THICKNESS AT OUTSIDE EDGE) THICKNESS: 1/2" (B) (OUTSIDE THICKNESS AT OUTSIDE EDGE) FRONT TO BACK: 3" (FROM END OF SHAFT TO FRONT ON INTAKE) INLET INSIDE DIAMETER: 1-7/8" INLET OUTSIDE DIAMETER: 2-1/8" SHAFT COVER LENGTH: 1-7/16" SHAFT COVER OD 5/8" (THIS IS WHERE THE IMPELLER SCREWS ONTO THE MOTOR SHAFT) MARKINGS: "91694200" IS MOLDED ONTO THE IMPELLER NEAR THE OUTSIDE EDGE OR THERE WILL BE 2 BLUE DOTS ON THE IMPELLER SHAFT.