Mower Blade 22.25" long x 2.00" wide x .75" center hole. Two outer holes .39"ID on 2.50" centers CW Rotation. 1704101 supersedes to 1716695. New OEM Simplicity part number/stamped 1704101.
Mower Blade 20.50" long x 2.50" wide x .75"ID center hole, outer holes .38"ID. CW. 1720679 supersedes to 1687014. This is part number 1720679 new OEM Simplicity.
Mower Blade 18.12" long x 2.50" wide x .75"ID hole. CW. New OEM. Serrated / Toothed Lift Wing. New OEM Simplicity part number 1721086. Blade stamped 1721086 Simplicity.