BELL & GOSSETT. PUMP MOTOR EXTENSION SHAFT ASSEMBLY FOR 5/8" MOTOR SHAFT DIAMETERS., DIMMENSIONS: 5" LONG X 1" DIAMETER SHAFT EXTENSION END, 3/4" DIAMETER KEY WAY END., HAS THREE 1/4"-20 DOG POINT SET SCREWS., HAS A 1/4" OD DIAMETER FEMALE THREADED FOR A 1/4"-20 SCREW., KEY WAY DIMMENSIONS: 1 1/4" LONG X 3/16" WIDE., MADE OF SOLID STEEL., INCLUDES: EXTENSION SHAFT, ONE BLACK ROUND RUBBER GASKET (2" TOTAL DIAMETER WITH A 1" DIAMETER INSIDE CIRCLE),ONE SHAFT KEY THAT IS  1" LONG X 3/16" WIDE, INSTALLATION INSTRUCTIONS, PACKAGING AND BOX/BAG., ORIGINAL OEM REPLACEMENT PART., GUARANTEED TO WORK PERFECTLY., BRAND NEW CONDITION., NEVER USED.